1
|
Fernando S, Landrini M, Macchioni A, Hughes DL, Budzelaar PHM, Rocchigiani L. Tweaking the bridge in metallocene Zr(IV)/W(IV) bimetallic hydrides. Dalton Trans 2023; 52:394-408. [PMID: 36519954 DOI: 10.1039/d2dt03833a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Zirconocene cations react with Cp2WH2 affording the bimetallic [Cp2Zr(μ-H)(μ-η1:η5-C5H4)WHCp]+ bridging hydride 1 (Cp = cyclopentadienyl anion, C5H5-) via σ-bond metathesis. Complex 1 features an atypical out of plane Zr(μ-H)W moiety, where no intermetallic interaction is involved, and a fluxional core. Coordination geometry and bond distances of the bridging hydride interaction can be modulated upon reaction with Lewis bases and unsaturated substrates. PMe3, P(p-tol)3, 3,5-dimethylpyridine and THF bind to 1 and shift the hydride bridge on the coordination plane of Zr. Insertion of olefins and alkynes into the Zr-C bond of 1 leads instead to alkyl and vinyl species where the Zr and W coordination planes are perpendicular to each other. Such alterations of the Zr(μ-H)W arrangement are reflected in the average 1H NMR chemical shift values of the hydride, which correlate linearly with computed Zr-H distances. Reactivity experiments with H2 showed that the bridging hydride interaction prevents bimetallic cooperativity and that σ-bond metathesis between Zr-C and H-H bonds is the preferred pathway for all the investigated complexes.
Collapse
Affiliation(s)
- Selwin Fernando
- School of Chemistry, University of East Anglia, Norwich Research Park, NR47TJ, Norwich, UK
| | - Martina Landrini
- Department of Chemistry, Biology and Biotechnology and CIRCC, University of Perugia, I-06123, Perugia, Italy.
| | - Alceo Macchioni
- Department of Chemistry, Biology and Biotechnology and CIRCC, University of Perugia, I-06123, Perugia, Italy.
| | - David L Hughes
- School of Chemistry, University of East Anglia, Norwich Research Park, NR47TJ, Norwich, UK
| | - Peter H M Budzelaar
- Department of Chemistry, University of Naples Federico II, Via Cintia, I-80126, Naples, Italy.
| | - Luca Rocchigiani
- School of Chemistry, University of East Anglia, Norwich Research Park, NR47TJ, Norwich, UK.,Department of Chemistry, Biology and Biotechnology and CIRCC, University of Perugia, I-06123, Perugia, Italy.
| |
Collapse
|
2
|
Landrini M, De Paolis E, Macchioni A, Tensi L, Hrobárik P, Rocchigiani L. Ion pairing in cationic Au(I)(µ‐H)2WCp2 bimetallic dihydrides. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Martina Landrini
- University of Perugia: Universita degli Studi di Perugia Department of Chemistry, Biology and Biotechnology ITALY
| | - Elena De Paolis
- University of Perugia: Universita degli Studi di Perugia Department of Chemistry, Biology and Biotechnology ITALY
| | - Alceo Macchioni
- University of Perugia: Universita degli Studi di Perugia Department of Chemistry, Biology and Biotechnology ITALY
| | - Leonardo Tensi
- University of Perugia: Universita degli Studi di Perugia Department of Chemistry, Biology and Biotechnology ITALY
| | - Peter Hrobárik
- Comenius University in Bratislava Faculty of Natural Sciences: Univerzita Komenskeho v Bratislave Prirodovedecka fakulta Department of Inorganic Chemistry SLOVAKIA
| | - Luca Rocchigiani
- University of Perugia: Universita degli Studi di Perugia Department of Chemistry, Biology and Biotechnology Via Elce di sotto, 8 06123 Perugia ITALY
| |
Collapse
|
3
|
Sian L, Dall’Anese A, Macchioni A, Tensi L, Busico V, Cipullo R, Goryunov GP, Uborsky D, Voskoboynikov AZ, Ehm C, Rocchigiani L, Zuccaccia C. Role of Solvent Coordination on the Structure and Dynamics of ansa-Zirconocenium Ion Pairs in Aromatic Hydrocarbons. Organometallics 2022. [DOI: 10.1021/acs.organomet.1c00653] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Leonardo Sian
- Dipartimento di Chimica, Biologia e Biotecnologie, Università degli studi di Perugia and CIRCC, Via Elce di sotto, 8, 06123 Perugia, Italy
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Anna Dall’Anese
- Dipartimento di Chimica, Biologia e Biotecnologie, Università degli studi di Perugia and CIRCC, Via Elce di sotto, 8, 06123 Perugia, Italy
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Alceo Macchioni
- Dipartimento di Chimica, Biologia e Biotecnologie, Università degli studi di Perugia and CIRCC, Via Elce di sotto, 8, 06123 Perugia, Italy
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Leonardo Tensi
- Dipartimento di Chimica, Biologia e Biotecnologie, Università degli studi di Perugia and CIRCC, Via Elce di sotto, 8, 06123 Perugia, Italy
| | - Vincenzo Busico
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Roberta Cipullo
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Georgy P. Goryunov
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Dmitry Uborsky
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Alexander Z. Voskoboynikov
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Christian Ehm
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Luca Rocchigiani
- Dipartimento di Chimica, Biologia e Biotecnologie, Università degli studi di Perugia and CIRCC, Via Elce di sotto, 8, 06123 Perugia, Italy
| | - Cristiano Zuccaccia
- Dipartimento di Chimica, Biologia e Biotecnologie, Università degli studi di Perugia and CIRCC, Via Elce di sotto, 8, 06123 Perugia, Italy
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| |
Collapse
|
4
|
Ciancaleoni G, Rocchigiani L. Assessing the Orbital Contribution in the "Spodium Bond" by Natural Orbital for Chemical Valence-Charge Displacement Analysis. Inorg Chem 2021; 60:4683-4692. [PMID: 33760600 DOI: 10.1021/acs.inorgchem.0c03650] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The term "spodium bond" (SpB) has been recently proposed to describe the noncoordinative interaction that can be established between a polarized group 12 metal and a mild Lewis base (LB). Most of the systems showing short metal-donor distances compatible with SpB are characterized by the coexistence of multiple weak interactions, including hydrogen and halogen bonding, making the assessment of real importance of SpB difficult. Here, we show that the relative importance of each contribution can be probed by dissecting the orbital component of the interaction through the extended transition state-natural orbital for chemical valence-charge displacement analysis (ETS-NOCV-CD). The latter gives useful information about relative energies and electrons involved, for model systems ([(thiourea)2MX2]···LB; M = Zn, Cd, and Hg; X = Cl and I; and LB = CH2S, CH2O, CH3CN, and CO) and a variety of structures extracted from experimentally characterized adducts, allowing us to demonstrate the lack of a direct correlation between a favorable metal-base distance and the presence of an orbital contribution for the SpB.
Collapse
Affiliation(s)
- Gianluca Ciancaleoni
- Università degli Studi di Pisa, Dipartimento di Chimica e Chimica Industriale, via Giuseppe Moruzzi 13, 56124 Pisa, Italy
| | - Luca Rocchigiani
- School of Chemistry, University of East Anglia, Norwich Research Park, NR4 7TJ Norwich, U.K
| |
Collapse
|
5
|
Affiliation(s)
- Luca Rocchigiani
- School of Chemistry, University of East Anglia, Norwich Research Park, Norwich NR47TJ, United Kingdom
| | - Manfred Bochmann
- School of Chemistry, University of East Anglia, Norwich Research Park, Norwich NR47TJ, United Kingdom
| |
Collapse
|
6
|
Rocchigiani L, Klooster WT, Coles SJ, Hughes DL, Hrobárik P, Bochmann M. Hydride Transfer to Gold: Yes or No? Exploring the Unexpected Versatility of Au⋅⋅⋅H−M Bonding in Heterobimetallic Dihydrides. Chemistry 2020; 26:8267-8280. [DOI: 10.1002/chem.202000016] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Indexed: 11/10/2022]
Affiliation(s)
- Luca Rocchigiani
- School of ChemistryUniversity of East Anglia Norwich Research Park Norwich NR47TJ UK
| | - Wim T. Klooster
- National Crystallography ServiceSchool of ChemistryUniversity of Southampton Southampton SO171BJ UK
| | - Simon J. Coles
- National Crystallography ServiceSchool of ChemistryUniversity of Southampton Southampton SO171BJ UK
| | - David L. Hughes
- School of ChemistryUniversity of East Anglia Norwich Research Park Norwich NR47TJ UK
| | - Peter Hrobárik
- Department of Inorganic ChemistryFaculty of Natural SciencesComenius University 84215 Bratislava Slovakia
| | - Manfred Bochmann
- School of ChemistryUniversity of East Anglia Norwich Research Park Norwich NR47TJ UK
| |
Collapse
|
7
|
Budzelaar PHM, Hughes DL, Bochmann M, Macchioni A, Rocchigiani L. H 2 activation by zirconaziridinium ions: σ-bond metathesis versus frustrated Lewis pair reactivity. Chem Commun (Camb) 2020; 56:2542-2545. [PMID: 32016193 DOI: 10.1039/c9cc09466k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Zirconaziridinium ions [Cp2Zr(η2-CH2NR2)]+ can potentially activate H2 by two routes: σ-bond metathesis or FLP reactivity. We show here that Zr-C hydrogenolysis by σ-bond metathesis precedes and enables subsequent heterolytic H2 cleavage through FLP pathways. DFT calculations show the involvement of transition states with approximately linear NHH and bent ZrHH arrangements without any direct Zr-amine interaction.
Collapse
Affiliation(s)
- Peter H M Budzelaar
- Department of Chemistry, University of Naples Federico II, Via Cintia, I-80126, Naples, Italy.
| | | | | | | | | |
Collapse
|
8
|
Rocchigiani L, Budzelaar PHM, Bochmann M. Heterolytic bond activation at gold: evidence for gold(iii) H-B, H-Si complexes, H-H and H-C cleavage. Chem Sci 2019; 10:2633-2642. [PMID: 30996979 PMCID: PMC6425858 DOI: 10.1039/c8sc05229h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Accepted: 01/15/2019] [Indexed: 11/21/2022] Open
Abstract
Gold(iii) forms spectroscopically detectable H–B and H–Si σ-complexes; experiments and DFT calculations demonstrate heterolytic H–Si, H–H and H–C bond cleavage.
The coordinatively unsaturated gold(iii) chelate complex [(C^N–CH)Au(C6F5)]+ (1+) reacts with main group hydrides H–BPin and H–SiEt3 in dichloromethane solution at –70 °C to form the corresponding σ-complexes, which were spectroscopically characterized (C^N–CH = 2-(C6H3But)-6-(C6H4But)pyridine anion; Pin = OCMe2CMe2O). In the presence of an external base such as diethyl ether, heterolytic cleavage of the silane H–Si bond leads to the gold hydrides [{(C^N–CH)AuC6F5}2(μ-H)]+ (2+) and (C^N–CH)AuH(C6F5) (5), together with spectroscopically detected [Et3Si–OEt2]+. The activation of dihydrogen also involves heterolytic H–H bond cleavage but requires a higher temperature (–20 °C). H2 activation proceeds in two mechanistically distinct steps: the first leading to 2 plus [H(OEt2)2]+, the second to protonation of one of the C^N pyridine ligands and reductive elimination of C6F5H. By comparison, formation of gold hydrides by cleavage of suitably activated C–H bonds is very much more facile; e.g. the reaction of 1·OEt2 with Hantzsch ester is essentially instantaneous and quantitative at –30 °C. This is the first experimental observation of species involved in the initial steps of gold catalyzed hydroboration, hydrosilylation and hydrogenation and the first demonstration of the ability of organic C–H bonds to act as hydride donors towards gold.
Collapse
Affiliation(s)
- Luca Rocchigiani
- School of Chemistry , University of East Anglia , Norwich Research Park , Norwich NR4 7TJ , UK . ;
| | - Peter H M Budzelaar
- Department of Chemistry , University of Naples Federico II , Via Cintia , 80126 Naples , Italy .
| | - Manfred Bochmann
- School of Chemistry , University of East Anglia , Norwich Research Park , Norwich NR4 7TJ , UK . ;
| |
Collapse
|
9
|
Fernandez-Cestau J, Rama RJ, Rocchigiani L, Bertrand B, Lalinde E, Linnolahti M, Bochmann M. Synthesis and Photophysical Properties of Au(III)–Ag(I) Aggregates. Inorg Chem 2019; 58:2020-2030. [DOI: 10.1021/acs.inorgchem.8b02987] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
| | - Raquel J. Rama
- School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
- Departamento de Química Inorgánica, Universidad de Sevilla, E- 41092 Sevilla, Spain
| | - Luca Rocchigiani
- School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
| | - Benoı̂t Bertrand
- School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
| | - Elena Lalinde
- Departamento de Química − Centro de Investigación en Síntesis Química, Universidad de La Rioja, 26006, Logroño, Spain
| | - Mikko Linnolahti
- Department of Chemistry, University of Eastern Finland, Joensuu Campus, Joensuu, Finland
| | - Manfred Bochmann
- School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
| |
Collapse
|
10
|
Chambrier I, Rocchigiani L, Hughes DL, Budzelaar PMH, Bochmann M. Thermally Stable Gold(III) Alkene and Alkyne Complexes: Synthesis, Structures, and Assessment of the trans-Influence on Gold-Ligand Bond Enthalpies. Chemistry 2018; 24:11467-11474. [PMID: 29846025 DOI: 10.1002/chem.201802160] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 05/29/2018] [Indexed: 11/09/2022]
Abstract
The reaction of [C^C)Au(OEt2 )2 ]+ with 1,5-cyclooctadiene or norbornadiene affords the corresponding olefin complexes [(C^C)Au(COD)]SbF6 and [(C^C)Au(NBD)]SbF6 , which are thermally stable in solution and the solid state (C^C=4,4'-di-tert-butylbiphenyl-2,2'-diyl). The crystal structures of these complexes have been determined. By contrast, dienones such as dibenzylideneacetone are O- rather than C=C-bonded. The reactions of (C^C)Au(OAcF )(L) (L=PMe3 or CNxyl) with B(C6 F5 )3 in the presence of bis(1-adamantyl)acetylene give the mixed-ligand alkyne complexes [(C^C)Au(AdC≡CAd)(L)]+ , the first complexes of their type in gold chemistry. In the presence of an excess of acetylene these compounds are thermally stable in solution and as solids. The bonding of n- and π-donor ligands to AuIII fragments and the effect of the trans influence exerted by N- and C-donors was explored with the aid of DFT calculations. Results show that the Au-L bond enthalpies trans to anionic C are 35-60 % of the enthalpies trans to N, with strong π-acceptors being particularly affected. In comparison with [Me2 Au]+ , the [(C^C)Au]+ fragment is more polar and in bond enthalpy terms resembles Me2 Pt.
Collapse
Affiliation(s)
- Isabelle Chambrier
- School of Chemistry, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Luca Rocchigiani
- School of Chemistry, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - David L Hughes
- School of Chemistry, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Peter M H Budzelaar
- Department of Chemistry, University of Naples Federico II, Via Cintia, 80126, Naples, Italy
| | - Manfred Bochmann
- School of Chemistry, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| |
Collapse
|
11
|
Rocchigiani L, Fernandez-Cestau J, Chambrier I, Hrobárik P, Bochmann M. Unlocking Structural Diversity in Gold(III) Hydrides: Unexpected Interplay of cis/ trans-Influence on Stability, Insertion Chemistry, and NMR Chemical Shifts. J Am Chem Soc 2018; 140:8287-8302. [PMID: 29860842 PMCID: PMC6047844 DOI: 10.1021/jacs.8b04478] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Indexed: 11/29/2022]
Abstract
The synthesis of new families of stable or at least spectroscopically observable gold(III) hydride complexes is reported, including anionic cis-hydrido chloride, hydrido aryl, and cis-dihydride complexes. Reactions between (C^C)AuCl(PR3) and LiHBEt3 afford the first examples of gold(III) phosphino hydrides (C^C)AuH(PR3) (R = Me, Ph, p-tolyl; C^C = 4,4'-di- tert-butylbiphenyl-2,2'-diyl). The X-ray structure of (C^C)AuH(PMe3) was determined. LiHBEt3 reacts with (C^C)AuCl(py) to give [(C^C)Au(H)Cl]-, whereas (C^C)AuH(PR3) undergoes phosphine displacement, generating the dihydride [(C^C)AuH2]-. Monohydrido complexes hydroaurate dimethylacetylene dicarboxylate to give Z-vinyls. (C^N^C)Au pincer complexes give the first examples of gold(III) bridging hydrides. Stability, reactivity and bonding characteristics of Au(III)-H complexes crucially depend on the interplay between cis and trans-influence. Remarkably, these new gold(III) hydrides extend the range of observed NMR hydride shifts from δ -8.5 to +7 ppm. Relativistic DFT calculations show that the origin of this wide chemical shift variability as a function of the ligands depends on the different ordering and energy gap between "shielding" Au(dπ)-based orbitals and "deshielding" σ(Au-H)-type MOs, which are mixed to some extent upon inclusion of spin-orbit (SO) coupling. The resulting 1H hydride shifts correlate linearly with the DFT optimized Au-H distances and Au-H bond covalency. The effect of cis ligands follows a nearly inverse ordering to that of trans ligands. This study appears to be the first systematic delineation of cis ligand influence on M-H NMR shifts and provides the experimental evidence for the dramatic change of the 1H hydride shifts, including the sign change, upon mutual cis and trans ligand alternation.
Collapse
Affiliation(s)
- Luca Rocchigiani
- School
of Chemistry, University of East Anglia, Norwich Research Park, NR4 7TJ Norwich, United Kingdom
| | - Julio Fernandez-Cestau
- School
of Chemistry, University of East Anglia, Norwich Research Park, NR4 7TJ Norwich, United Kingdom
| | - Isabelle Chambrier
- School
of Chemistry, University of East Anglia, Norwich Research Park, NR4 7TJ Norwich, United Kingdom
| | - Peter Hrobárik
- Institut
für Chemie, Technische Universität
Berlin, Straße des 17. Juni 135, D-10623 Berlin, Germany
- Department
of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University, SK-84215 Bratislava, Slovakia
| | - Manfred Bochmann
- School
of Chemistry, University of East Anglia, Norwich Research Park, NR4 7TJ Norwich, United Kingdom
| |
Collapse
|
12
|
Rocchigiani L, Fernandez-Cestau J, Budzelaar PHM, Bochmann M. Reductive Elimination Leading to C−C Bond Formation in Gold(III) Complexes: A Mechanistic and Computational Study. Chemistry 2018; 24:8893-8903. [DOI: 10.1002/chem.201801277] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 04/04/2018] [Indexed: 11/05/2022]
Affiliation(s)
- Luca Rocchigiani
- School of Chemistry; University of East Anglia; Norwich Research Park NR47TJ Norwich UK
| | | | - Peter H. M. Budzelaar
- Department of Chemistry; University of Naples Federico II; Via Cintia 80126 Naples Italy
| | - Manfred Bochmann
- School of Chemistry; University of East Anglia; Norwich Research Park NR47TJ Norwich UK
| |
Collapse
|
13
|
Abstract
Thiols were found to cleave Au–C bonds in (C^N^C)gold(iii) pincer complexes and to induce C–S reductive elimination reactions, to give aryl thioethers.
Collapse
Affiliation(s)
- Lucy Currie
- School of Chemistry
- University of East Anglia
- Norwich NR4 7TJ
- UK
| | | | - David L. Hughes
- School of Chemistry
- University of East Anglia
- Norwich NR4 7TJ
- UK
| | | |
Collapse
|
14
|
Fernandez-Cestau J, Rocchigiani L, Pintus A, Rama RJ, Budzelaar PHM, Bochmann M. Isocyanide insertion into Au–H bonds: first gold iminoformyl complexes. Chem Commun (Camb) 2018; 54:11447-11450. [DOI: 10.1039/c8cc06409a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The reaction of gold hydrides with isocyanides leads to η1-iminoformyl complexes, the first example of an isocyanide insertion in gold chemistry. Key intermediates are gold(ii) isocyanide adducts.
Collapse
Affiliation(s)
| | | | - Anna Pintus
- School of Chemistry, University of East Anglia
- Norwich
- UK
| | - Raquel J. Rama
- School of Chemistry, University of East Anglia
- Norwich
- UK
- Departamento de Química Inorgánica, Universidad de Sevilla
- E-41092 Sevilla
| | | | | |
Collapse
|
15
|
Rocchigiani L, Fernandez‐Cestau J, Agonigi G, Chambrier I, Budzelaar PHM, Bochmann M. Gold(III) Alkyne Complexes: Bonding and Reaction Pathways. Angew Chem Int Ed Engl 2017; 56:13861-13865. [PMID: 28892244 PMCID: PMC5698712 DOI: 10.1002/anie.201708640] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Indexed: 11/26/2022]
Abstract
The synthesis and characterization of hitherto hypothetical AuIII π-alkyne complexes is reported. Bonding and stability depend strongly on the trans effect and steric factors. Bonding characteristics shed light on the reasons for the very different stabilities between the classical alkyne complexes of PtII and their drastically more reactive AuIII congeners. Lack of back-bonding facilitates alkyne slippage, which is energetically less costly for gold than for platinum and explains the propensity of gold to facilitate C-C bond formation. Cycloaddition followed by aryl migration and reductive deprotonation is presented as a new reaction sequence in gold chemistry.
Collapse
Affiliation(s)
- Luca Rocchigiani
- School of ChemistryUniversity of East AngliaNorwich Research ParkNorwichNR4 7TJUK
| | | | - Gabriele Agonigi
- School of ChemistryUniversity of East AngliaNorwich Research ParkNorwichNR4 7TJUK
| | - Isabelle Chambrier
- School of ChemistryUniversity of East AngliaNorwich Research ParkNorwichNR4 7TJUK
| | | | - Manfred Bochmann
- School of ChemistryUniversity of East AngliaNorwich Research ParkNorwichNR4 7TJUK
| |
Collapse
|
16
|
Rocchigiani L, Fernandez-Cestau J, Agonigi G, Chambrier I, Budzelaar PHM, Bochmann M. Gold(III) Alkyne Complexes: Bonding and Reaction Pathways. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201708640] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Luca Rocchigiani
- School of Chemistry; University of East Anglia; Norwich Research Park Norwich NR4 7TJ UK
| | - Julio Fernandez-Cestau
- School of Chemistry; University of East Anglia; Norwich Research Park Norwich NR4 7TJ UK
| | - Gabriele Agonigi
- School of Chemistry; University of East Anglia; Norwich Research Park Norwich NR4 7TJ UK
| | - Isabelle Chambrier
- School of Chemistry; University of East Anglia; Norwich Research Park Norwich NR4 7TJ UK
| | - Peter H. M. Budzelaar
- Department of Chemistry; University of Naples Federico II; Via Cintia 80126 Naples Italy
| | - Manfred Bochmann
- School of Chemistry; University of East Anglia; Norwich Research Park Norwich NR4 7TJ UK
| |
Collapse
|
17
|
Orbelli Biroli A, Tessore F, Righetto S, Forni A, Macchioni A, Rocchigiani L, Pizzotti M, Di Carlo G. Intriguing Influence of -COOH-Driven Intermolecular Aggregation and Acid-Base Interactions with N,N-Dimethylformamide on the Second-Order Nonlinear-Optical Response of 5,15 Push-Pull Diarylzinc(II) Porphyrinates. Inorg Chem 2017; 56:6438-6450. [PMID: 28475347 DOI: 10.1021/acs.inorgchem.7b00510] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A series of 5,15 push-pull meso-diarylzinc(II) porphyrinates, carrying one or two -COOH or -COOCH3 acceptor groups and a -OCH3 or a -N(CH3)2 donor group, show in N,N-dimethylformamide and CHCl3 solutions a negative and solvent-dependent second-order nonlinear-optical (NLO) response measured by the electric-field-induced second-harmonic generation (EFISH) technique, different from the structurally related zinc(II) porphyrinate carrying a -N(CH3)2 donor group and a -NO2 acceptor group, where a still solvent-dependent but positive EFISH second-order response was previously reported. Moreover, when a -N(CH3)2 donor group and a -COOH acceptor group are part of a sterically hindered 2,12 push-pull β-pyrrolic-substituted tetraarylzinc(II) porphyrinate, the EFISH response is positive and solvent-independent. In order to rationalize these rather intriguing series of observations, EFISH measurements have been integrated by electronic absorption and IR spectroscopic investigations and by density functional theory (DFT) and coupled-perturbed DFT theoretical and 1H pulsed-gradient spin-echo NMR investigations, which prompt that the significant concentration effects and the strong influence of the solvent nature on the NLO response are originated by a complex whole of different aggregation processes induced by the -COOH group.
Collapse
Affiliation(s)
- Alessio Orbelli Biroli
- Istituto di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM), SmartMatLab Centre, via C. Golgi 19, 20133 Milano, Italy
| | - Francesca Tessore
- Dipartimento di Chimica, Unità di Ricerca dell'INSTM, Università degli Studi di Milano , via C. Golgi 19, 20133 Milano, Italy
| | - Stefania Righetto
- Dipartimento di Chimica, Unità di Ricerca dell'INSTM, Università degli Studi di Milano , via C. Golgi 19, 20133 Milano, Italy
| | - Alessandra Forni
- Istituto di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM), SmartMatLab Centre, via C. Golgi 19, 20133 Milano, Italy
| | - Alceo Macchioni
- Dipartimento di Chimica, Biologia e Biotecnologie and CIRCC, Università degli Studi di Perugia , via Elce di Sotto 8, 06123 Perugia, Italy
| | - Luca Rocchigiani
- Dipartimento di Chimica, Biologia e Biotecnologie and CIRCC, Università degli Studi di Perugia , via Elce di Sotto 8, 06123 Perugia, Italy.,School of Chemistry, University of East Anglia , Norwich Research Park, Norwich, NR4 7TJ, United Kingdom
| | - Maddalena Pizzotti
- Dipartimento di Chimica, Unità di Ricerca dell'INSTM, Università degli Studi di Milano , via C. Golgi 19, 20133 Milano, Italy
| | - Gabriele Di Carlo
- Dipartimento di Chimica, Unità di Ricerca dell'INSTM, Università degli Studi di Milano , via C. Golgi 19, 20133 Milano, Italy
| |
Collapse
|
18
|
Rocchigiani L, Fernandez-Cestau J, Budzelaar PHM, Bochmann M. Arene C–H activation by gold(iii): solvent-enabled proton shuttling, and observation of a pre-metallation Au–arene intermediate. Chem Commun (Camb) 2017; 53:4358-4361. [DOI: 10.1039/c7cc01628j] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Au–C bond cleavage by H+ and C–H activation by Au(iii) are reversible through solvent-enabled proton shuttling. In the absence of a donor solvent, a gold(iii)–arene intermediate is detected.
Collapse
Affiliation(s)
| | | | - P. H. M. Budzelaar
- Department of Chemical Sciences
- Federico II University of Naples
- 80126 Napoli
- Italy
| | - M. Bochmann
- School of Chemistry
- University of East Anglia
- Norwich
- UK
| |
Collapse
|
19
|
Currie L, Fernandez-Cestau J, Rocchigiani L, Bertrand B, Lancaster SJ, Hughes DL, Duckworth H, Jones STE, Credgington D, Penfold TJ, Bochmann M. Frontispiece: Luminescent Gold(III) Thiolates: Supramolecular Interactions Trigger and Control Switchable Photoemissions from Bimolecular Excited States. Chemistry 2017. [DOI: 10.1002/chem.201780164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Lucy Currie
- School of Chemistry; University of East Anglia; Norwich NR4 7TJ United Kingdom
| | | | - Luca Rocchigiani
- School of Chemistry; University of East Anglia; Norwich NR4 7TJ United Kingdom
| | - Benoît Bertrand
- School of Chemistry; University of East Anglia; Norwich NR4 7TJ United Kingdom
| | - Simon J. Lancaster
- School of Chemistry; University of East Anglia; Norwich NR4 7TJ United Kingdom
| | - David L. Hughes
- School of Chemistry; University of East Anglia; Norwich NR4 7TJ United Kingdom
| | - Helen Duckworth
- School of Chemistry; Newcastle University; Newcastle upon Tyne NE1 7RU United Kingdom
| | - Saul T. E. Jones
- Department of Physics; Cavendish Laboratory; Cambridge University; Cambridge CB3 0HF United Kingdom
| | - Dan Credgington
- Department of Physics; Cavendish Laboratory; Cambridge University; Cambridge CB3 0HF United Kingdom
| | - Thomas J. Penfold
- School of Chemistry; Newcastle University; Newcastle upon Tyne NE1 7RU United Kingdom
| | - Manfred Bochmann
- School of Chemistry; University of East Anglia; Norwich NR4 7TJ United Kingdom
| |
Collapse
|
20
|
Currie L, Fernandez-Cestau J, Rocchigiani L, Bertrand B, Lancaster SJ, Hughes DL, Duckworth H, Jones STE, Credgington D, Penfold TJ, Bochmann M. Luminescent Gold(III) Thiolates: Supramolecular Interactions Trigger and Control Switchable Photoemissions from Bimolecular Excited States. Chemistry 2016; 23:105-113. [PMID: 27859790 PMCID: PMC5215685 DOI: 10.1002/chem.201603841] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Indexed: 11/21/2022]
Abstract
A new family of cyclometallated gold(III) thiolato complexes based on pyrazine‐centred pincer ligands has been prepared, (C^Npz^C)AuSR, where C^Npz^C=2,6‐bis(4‐ButC6H4)pyrazine dianion and R=Ph (1), C6H4tBu‐4 (2), 2‐pyridyl (3), 1‐naphthyl (1‐Np, 4), 2‐Np (5), quinolinyl (Quin, 6), 4‐methylcoumarinyl (Coum, 7) and 1‐adamantyl (8). The complexes were isolated as yellow to red solids in high yields using mild synthetic conditions. The single‐crystal X‐ray structures revealed that the colour of the deep‐red solids is associated with the formation of a particular type of short (3.2–3.3 Å) intermolecular pyrazine⋅⋅⋅pyrazine π‐interactions. In some cases, yellow and red crystal polymorphs were formed; only the latter were emissive at room temperature. Combined NMR and UV/Vis techniques showed that the supramolecular π‐stacking interactions persist in solution and give rise to intense deep‐red photoluminescence. Monomeric molecules show vibronically structured green emissions at low temperature, assigned to ligand‐based 3IL(C^N^C) triplet emissions. By contrast, the unstructured red emissions correlate mainly with a 3LLCT(SR→{(C^Npz^C)2}) charge transfer transition from the thiolate ligand to the π⋅⋅⋅π dimerized pyrazine. Unusually, the π‐interactions can be influenced by sample treatment in solution, such that the emissions can switch reversibly from red to green. To our knowledge this is the first report of aggregation‐enhanced emission in gold(III) chemistry.
Collapse
Affiliation(s)
- Lucy Currie
- School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
| | | | - Luca Rocchigiani
- School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
| | - Benoît Bertrand
- School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
| | - Simon J Lancaster
- School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
| | - David L Hughes
- School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
| | - Helen Duckworth
- School of Chemistry, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom
| | - Saul T E Jones
- Department of Physics, Cavendish Laboratory, Cambridge University, Cambridge, CB3 0HF, United Kingdom
| | - Dan Credgington
- Department of Physics, Cavendish Laboratory, Cambridge University, Cambridge, CB3 0HF, United Kingdom
| | - Thomas J Penfold
- School of Chemistry, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom
| | - Manfred Bochmann
- School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
| |
Collapse
|
21
|
Pintus A, Rocchigiani L, Fernandez-Cestau J, Budzelaar PHM, Bochmann M. Stereo- and Regioselective Alkyne Hydrometallation with Gold(III) Hydrides. Angew Chem Int Ed Engl 2016; 55:12321-4. [PMID: 27592697 PMCID: PMC5113781 DOI: 10.1002/anie.201607522] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Indexed: 11/10/2022]
Abstract
The hydroauration of internal and terminal alkynes by gold(III) hydride complexes [(C^N^C)AuH] was found to be mediated by radicals and proceeds by an unexpected binuclear outer-sphere mechanism to cleanly form trans-insertion products. Radical precursors such as azobisisobutyronitrile lead to a drastic rate enhancement. DFT calculations support the proposed radical mechanism, with very low activation barriers, and rule out mononuclear mechanistic alternatives. These alkyne hydroaurations are highly regio- and stereospecific for the formation of Z-vinyl isomers, with Z/E ratios of >99:1 in most cases.
Collapse
Affiliation(s)
- Anna Pintus
- School of Chemistry, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Luca Rocchigiani
- School of Chemistry, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Julio Fernandez-Cestau
- School of Chemistry, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Peter H M Budzelaar
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, Canada.
| | - Manfred Bochmann
- School of Chemistry, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK.
| |
Collapse
|
22
|
Pintus A, Rocchigiani L, Fernandez-Cestau J, Budzelaar PHM, Bochmann M. Stereo- and Regioselective Alkyne Hydrometallation with Gold(III) Hydrides. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607522] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Anna Pintus
- School of Chemistry; University of East Anglia; Norwich Research Park Norwich NR4 7TJ UK
| | - Luca Rocchigiani
- School of Chemistry; University of East Anglia; Norwich Research Park Norwich NR4 7TJ UK
| | - Julio Fernandez-Cestau
- School of Chemistry; University of East Anglia; Norwich Research Park Norwich NR4 7TJ UK
| | | | - Manfred Bochmann
- School of Chemistry; University of East Anglia; Norwich Research Park Norwich NR4 7TJ UK
| |
Collapse
|
23
|
Affiliation(s)
- Luca Rocchigiani
- Dipartimento
di Chimica, Biologia e Biotecnologie and CIRCC, Università degli Studi di Perugia, Via Elce di sotto, 8, I-06123 Perugia, Italy
- Dutch Polymer Institute (DPI) P.O. Box
902, 5600 AX Eindhoven, The Netherlands
| | - Vincenzo Busico
- Dutch Polymer Institute (DPI) P.O. Box
902, 5600 AX Eindhoven, The Netherlands
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, I-80126 Napoli, Italy
| | - Antonello Pastore
- Dutch Polymer Institute (DPI) P.O. Box
902, 5600 AX Eindhoven, The Netherlands
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, I-80126 Napoli, Italy
| | - Alceo Macchioni
- Dipartimento
di Chimica, Biologia e Biotecnologie and CIRCC, Università degli Studi di Perugia, Via Elce di sotto, 8, I-06123 Perugia, Italy
- Dutch Polymer Institute (DPI) P.O. Box
902, 5600 AX Eindhoven, The Netherlands
| |
Collapse
|
24
|
Rocchigiani L, Macchioni A. Disclosing the multi-faceted world of weakly interacting inorganic systems by means of NMR spectroscopy. Dalton Trans 2016; 45:2785-90. [DOI: 10.1039/c5dt04620c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The potential of NMR spectroscopy to investigate inorganic systems whose structure and reactivity is affected by non-covalent interactions is described; supramolecular assemblies based on relatively unusual intermolecular forces or on more classical ones, still rather unexplored in solution, are considered.
Collapse
Affiliation(s)
| | - Alceo Macchioni
- Department of Chemistry
- Biology and Biotechnology and CIRCC
- University of Perugia
- Perugia
- Italy
| |
Collapse
|
25
|
Ciancaleoni G, Macchioni A, Rocchigiani L, Zuccaccia C. A PGSE NMR approach to the characterization of single and multi-site halogen-bonded adducts in solution. RSC Adv 2016. [DOI: 10.1039/c6ra17455h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The diffusional PGSE NMR technique allows a detailed characterization of single- and multi-site halogen-bonded systems.
Collapse
Affiliation(s)
- Gianluca Ciancaleoni
- Departamento de Química
- Universidade Federal de Santa Catarina
- 88040-900 Florianópolis
- Brazil
| | - Alceo Macchioni
- Dipartimento di Chimica
- Biologia e Biotecnologie
- Universitá degli Studi di Perugia
- Perugia
- Italy
| | - Luca Rocchigiani
- Dipartimento di Chimica
- Biologia e Biotecnologie
- Universitá degli Studi di Perugia
- Perugia
- Italy
| | - Cristiano Zuccaccia
- Dipartimento di Chimica
- Biologia e Biotecnologie
- Universitá degli Studi di Perugia
- Perugia
- Italy
| |
Collapse
|
26
|
Gallo V, Intini N, Mastrorilli P, Latronico M, Scapicchio P, Triggiani M, Bevilacqua V, Fanizzi P, Acquotti D, Airoldi C, Arnesano F, Assfalg M, Benevelli F, Bertelli D, Cagliani LR, Casadei L, Cesare Marincola F, Colafemmina G, Consonni R, Cosentino C, Davalli S, De Pascali SA, D'Aiuto V, Faccini A, Gobetto R, Lamanna R, Liguori F, Longobardi F, Mallamace D, Mazzei P, Menegazzo I, Milone S, Mucci A, Napoli C, Pertinhez T, Rizzuti A, Rocchigiani L, Schievano E, Sciubba F, Sobolev A, Tenori L, Valerio M. Performance Assessment in Fingerprinting and Multi Component Quantitative NMR Analyses. Anal Chem 2015; 87:6709-17. [PMID: 26020452 DOI: 10.1021/acs.analchem.5b00919] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
An interlaboratory comparison (ILC) was organized with the aim to set up quality control indicators suitable for multicomponent quantitative analysis by nuclear magnetic resonance (NMR) spectroscopy. A total of 36 NMR data sets (corresponding to 1260 NMR spectra) were produced by 30 participants using 34 NMR spectrometers. The calibration line method was chosen for the quantification of a five-component model mixture. Results show that quantitative NMR is a robust quantification tool and that 26 out of 36 data sets resulted in statistically equivalent calibration lines for all considered NMR signals. The performance of each laboratory was assessed by means of a new performance index (named Qp-score) which is related to the difference between the experimental and the consensus values of the slope of the calibration lines. Laboratories endowed with a Qp-score falling within the suitable acceptability range are qualified to produce NMR spectra that can be considered statistically equivalent in terms of relative intensities of the signals. In addition, the specific response of nuclei to the experimental excitation/relaxation conditions was addressed by means of the parameter named NR. NR is related to the difference between the theoretical and the consensus slopes of the calibration lines and is specific for each signal produced by a well-defined set of acquisition parameters.
Collapse
Affiliation(s)
- Vito Gallo
- 1Dipartimento di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica, Politecnico di Bari, Via Orabona 4 CAMPUS, I-70125, Bari, Italy.,2SAMER (Special Agency of the Chamber of Commerce of Bari), Via E. Mola 19, I-70121, Bari, Italy.,3Innovative Solutions S.r.l., Spin Off del Politecnico di Bari, Zona H 150/B, I-70015, Noci, Bari, Italy
| | - Nicola Intini
- 3Innovative Solutions S.r.l., Spin Off del Politecnico di Bari, Zona H 150/B, I-70015, Noci, Bari, Italy
| | - Piero Mastrorilli
- 1Dipartimento di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica, Politecnico di Bari, Via Orabona 4 CAMPUS, I-70125, Bari, Italy.,3Innovative Solutions S.r.l., Spin Off del Politecnico di Bari, Zona H 150/B, I-70015, Noci, Bari, Italy
| | - Mario Latronico
- 1Dipartimento di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica, Politecnico di Bari, Via Orabona 4 CAMPUS, I-70125, Bari, Italy.,3Innovative Solutions S.r.l., Spin Off del Politecnico di Bari, Zona H 150/B, I-70015, Noci, Bari, Italy
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Antonino Rizzuti
- 1Dipartimento di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica, Politecnico di Bari, Via Orabona 4 CAMPUS, I-70125, Bari, Italy
| | | | | | | | | | | | | |
Collapse
|
27
|
Rocchigiani L, Jia M, Bandini M, Macchioni A. Assessing the Role of Counterion in Gold-Catalyzed Dearomatization of Indoles with Allenamides by NMR Studies. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00502] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Luca Rocchigiani
- Department
of Chemistry, Biology and Biotechnology, University of Perugia and CIRCC, Via Elce di sotto, 8, I-06123 Perugia, Italy
| | - Minqiang Jia
- Department
of Chemistry “G. Ciamician”, Alma Mater Studiorum − University of Bologna, Via Selmi 2, I-40126 Bologna, Italy
| | - Marco Bandini
- Department
of Chemistry “G. Ciamician”, Alma Mater Studiorum − University of Bologna, Via Selmi 2, I-40126 Bologna, Italy
| | - Alceo Macchioni
- Department
of Chemistry, Biology and Biotechnology, University of Perugia and CIRCC, Via Elce di sotto, 8, I-06123 Perugia, Italy
- Istituto
di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM), c/o Department
of Chemistry, Biology and Biotechnology, University of Perugia, I-06123, Perugia, Italy
| |
Collapse
|
28
|
Corbucci I, Petronilho A, Müller-Bunz H, Rocchigiani L, Albrecht M, Macchioni A. Substantial Improvement of Pyridine-Carbene Iridium Water Oxidation Catalysts by a Simple Methyl-to-Octyl Substitution. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00319] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ilaria Corbucci
- Department
of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto, 8, I-06123, Perugia, Italy
| | - Ana Petronilho
- School
of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Helge Müller-Bunz
- School
of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Luca Rocchigiani
- Department
of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto, 8, I-06123, Perugia, Italy
| | - Martin Albrecht
- School
of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Alceo Macchioni
- Department
of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto, 8, I-06123, Perugia, Italy
| |
Collapse
|
29
|
|
30
|
Savini A, Bucci A, Bellachioma G, Giancola S, Palomba F, Rocchigiani L, Rossi A, Suriani M, Zuccaccia C, Macchioni A. New iridium(III) organometallic complexes bearing strong electron donating bidentate ligands as catalysts for water oxidation. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.05.029] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
31
|
Ciancaleoni G, Bertani R, Rocchigiani L, Sgarbossa P, Zuccaccia C, Macchioni A. Discriminating Halogen-Bonding from Other Noncovalent Interactions by a Combined NOE NMR/DFT Approach. Chemistry 2014; 21:440-7. [DOI: 10.1002/chem.201404883] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2014] [Indexed: 11/08/2022]
|
32
|
Rocchigiani L, Busico V, Pastore A, Talarico G, Macchioni A. Unusual Hafnium-Pyridylamido/ERnHeterobimetallic Adducts (ERn=ZnR2or AlR3). Angew Chem Int Ed Engl 2014; 53:2157-61. [DOI: 10.1002/anie.201308370] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 11/22/2013] [Indexed: 11/08/2022]
|
33
|
Rocchigiani L, Busico V, Pastore A, Talarico G, Macchioni A. Unusual Hafnium-Pyridylamido/ERnHeterobimetallic Adducts (ERn=ZnR2or AlR3). Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201308370] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
34
|
Rocchigiani L, Ciancaleoni G, Zuccaccia C, Macchioni A. Probing the Association of Frustrated Phosphine–Borane Lewis Pairs in Solution by NMR Spectroscopy. J Am Chem Soc 2013; 136:112-5. [DOI: 10.1021/ja4119169] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Luca Rocchigiani
- Dipartimento
di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Via Elce di Sotto 8, I-06123 Perugia, Italy
| | - Gianluca Ciancaleoni
- Istituto
del CNR di Science e Tecnologie Molecolari, c/o Dipartimento di Chimica,
Biologia e Biotecnologie, Università degli Studi di Perugia, I-06123 Perugia, Italy
| | - Cristiano Zuccaccia
- Dipartimento
di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Via Elce di Sotto 8, I-06123 Perugia, Italy
| | - Alceo Macchioni
- Dipartimento
di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Via Elce di Sotto 8, I-06123 Perugia, Italy
| |
Collapse
|
35
|
Galassi R, Ricci S, Burini A, Macchioni A, Rocchigiani L, Marmottini F, Tekarli SM, Nesterov VN, Omary MA. Solventless supramolecular chemistry via vapor diffusion of volatile small molecules upon a new trinuclear silver(I)-nitrated pyrazolate macrometallocyclic solid: an experimental/theoretical investigation of the dipole/quadrupole chemisorption phenomena. Inorg Chem 2013; 52:14124-37. [PMID: 24256298 DOI: 10.1021/ic401948p] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
A comparative study on the tendency of a new trinuclear silver(I) pyrazolate, namely, [N,N-(3,5-dinitropyrazolate)Ag]3 (1), and a similar compound known previously, [N,N-[3,5-bis(trifluoromethyl)pyrazolate]Ag]3 (2), to adsorb small volatile molecules was performed. It was found that 1 has a remarkable tendency to form adducts, at room temperature and atmospheric pressure, with acetone, acetylacetone, ammonia, pyridine, acetonitrile, triethylamine, dimethyl sulfide, and tetrahydrothiophene, while carbon monoxide, tetrahydrofuran, alcohols, and diethyl ether were not adsorbed. On the contrary, 2 did not undergo adsorption of any of the aforementioned volatile molecules. Adducts of 1 were characterized by elemental analysis, IR, thermogravimetric analysis (TGA), Brunauer-Emmett-Teller (BET) surface area, and diffusion NMR measurements. The crystal structures of 1·2CH3CN and compound 3, derived from an attempt to crystallize the adduct of 1 with ammonia, were determined by single-crystal X-ray diffractometric studies. The former shows a sandwich structure with a 1:2 stoichiometric [Ag3]/[CH3CN] ratio in which one acetonitrile molecule points above and the other below the centroid of the Ag3N6 metallocycle. Compound 3 formed via rearrangement of the ammonia adduct to yield an anionic trinuclear silver(I) derivative with an additional bridging 3,5-dinitropyrazolate and having [Ag(NH3)2](+) as the counterion, [Ag(NH3)2][N,N-(3,5-dinitropyrazolate)4Ag3]. Irreversible sorption and/or decomposition upon vapor exposure are desirable advantages toward toxic gas filtration applications, including ammonia inhalation. TGA confirms the analytical data for all of the samples, showing weight loss for each adsorbed molecule at temperatures significantly higher than the corresponding boiling temperature, which suggests a chemical-bonding nature for adsorption as opposed to physisorption. BET surface measurements of the "naked" compound 1 excluded physical adsorption in its porous cavities. Density functional theory simulation results are also consistent with the chemisorption model, explain the experimental adsorption selectivity for 1, and attribute the lack of similar adsorption by 2 to significantly less polarizable electrostatic potential and also to strong argentophilic bonding whose energy is even higher than the quadrupole-dipole adduct bond energy upon proper selection of the density functional.
Collapse
Affiliation(s)
- Rossana Galassi
- School of Science and Technology, University of Camerino , Via Sant'Agostino 1, Camerino I-62032, Italy
| | | | | | | | | | | | | | | | | |
Collapse
|
36
|
Savini A, Bucci A, Bellachioma G, Rocchigiani L, Zuccaccia C, Llobet A, Macchioni A. Mechanistic Aspects of Water Oxidation Catalyzed by Organometallic Iridium Complexes. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300530] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
37
|
Rocchigiani L, Busico V, Pastore A, Macchioni A. Probing the interactions between all components of the catalytic pool for homogeneous olefin polymerisation by diffusion NMR spectroscopy. Dalton Trans 2013; 42:9104-11. [DOI: 10.1039/c3dt00041a] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
|
38
|
Bucci A, Savini A, Rocchigiani L, Zuccaccia C, Rizzato S, Albinati A, Llobet A, Macchioni A. Organometallic Iridium Catalysts Based on Pyridinecarboxylate Ligands for the Oxidative Splitting of Water. Organometallics 2012. [DOI: 10.1021/om301024s] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Alberto Bucci
- Dipartimento
di Chimica, University of Perugia, Via Elce di Sotto 8, Perugia, Italy
| | - Arianna Savini
- Dipartimento
di Chimica, University of Perugia, Via Elce di Sotto 8, Perugia, Italy
| | - Luca Rocchigiani
- Dipartimento
di Chimica, University of Perugia, Via Elce di Sotto 8, Perugia, Italy
| | - Cristiano Zuccaccia
- Dipartimento
di Chimica, University of Perugia, Via Elce di Sotto 8, Perugia, Italy
| | - Silvia Rizzato
- Dipartimento di Chimica, University of Milano, Via Golgi 19, Milano, Italy
| | - Alberto Albinati
- Dipartimento di Chimica, University of Milano, Via Golgi 19, Milano, Italy
| | - Antoni Llobet
- Institute of Chemical Research of Catalonia, Avinguda Paı̈sos
Catalans 16, Tarragona, Spain
| | - Alceo Macchioni
- Dipartimento
di Chimica, University of Perugia, Via Elce di Sotto 8, Perugia, Italy
| |
Collapse
|
39
|
Rocchigiani L, Ciancaleoni G, Zuccaccia C, Macchioni A. An Integrated NMR and DFT Study on the Single Insertion of α-Olefins into the MC Bond of Group 4 Metallaaziridinium Ion Pairs. ChemCatChem 2012. [DOI: 10.1002/cctc.201200341] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
40
|
Savini A, Bellachioma G, Bolaño S, Rocchigiani L, Zuccaccia C, Zuccaccia D, Macchioni A. Iridium-EDTA as an efficient and readily available catalyst for water oxidation. ChemSusChem 2012; 5:1415-1419. [PMID: 22786661 DOI: 10.1002/cssc.201200067] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Revised: 04/04/2012] [Indexed: 06/01/2023]
Affiliation(s)
- Arianna Savini
- Department of Chemistry, University of Perugia, Via Elce di Sotto 8, I-06123, Perugia, Italy
| | | | | | | | | | | | | |
Collapse
|
41
|
Affiliation(s)
- Luca Rocchigiani
- Dipartimento di
Chimica, Università degli Studi di Perugia, via Elce di Sotto 8, I-06123, Perugia, Italy
| | - Alceo Macchioni
- Dipartimento di
Chimica, Università degli Studi di Perugia, via Elce di Sotto 8, I-06123, Perugia, Italy
| | - Cristiano Zuccaccia
- Dipartimento di
Chimica, Università degli Studi di Perugia, via Elce di Sotto 8, I-06123, Perugia, Italy
| |
Collapse
|
42
|
Dragonetti C, Valore A, Colombo A, Righetto S, Rampinini G, Colombo F, Rocchigiani L, Macchioni A. An investigation on the second-order NLO properties of novel cationic cyclometallated Ir(III) complexes of the type [Ir(2-phenylpyridine)2(9-R-4,5-diazafluorene)]+ (R=H, fulleridene) and the related neutral complex with the new 9-fulleriden-4-monoazafluorene ligand. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2011.10.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
43
|
Zuccaccia C, Bellachioma G, Bolaño S, Rocchigiani L, Savini A, Macchioni A. An NMR Study of the Oxidative Degradation of Cp*Ir Catalysts for Water Oxidation: Evidence for a Preliminary Attack on the Quaternary Carbon Atom of the -C-CH3 Moiety. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100954] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
44
|
Rocchigiani L, Ciancaleoni G, Zuccaccia C, Macchioni A. Low-Temperature Kinetic NMR Studies on the Insertion of a Single Olefin Molecule into a ZrC Bond: Assessing the Counterion-Solvent Interplay. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201105122] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
45
|
Rocchigiani L, Ciancaleoni G, Zuccaccia C, Macchioni A. Low-Temperature Kinetic NMR Studies on the Insertion of a Single Olefin Molecule into a ZrC Bond: Assessing the Counterion-Solvent Interplay. Angew Chem Int Ed Engl 2011; 50:11752-5. [DOI: 10.1002/anie.201105122] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Indexed: 11/09/2022]
|
46
|
Rocchigiani L, Bellachioma G, Ciancaleoni G, Macchioni A, Zuccaccia D, Zuccaccia C. Synthesis, Characterization, Interionic Structure, and Self-Aggregation Tendency of Zirconaaziridinium Salts Bearing Long Alkyl Chains. Organometallics 2010. [DOI: 10.1021/om100827z] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Luca Rocchigiani
- Dipartimento di Chimica, Università degli Studi di Perugia, via Elce di Sotto 8, I-06123 Perugia, Italy
| | - Gianfranco Bellachioma
- Dipartimento di Chimica, Università degli Studi di Perugia, via Elce di Sotto 8, I-06123 Perugia, Italy
| | - Gianluca Ciancaleoni
- Dipartimento di Chimica, Università degli Studi di Perugia, via Elce di Sotto 8, I-06123 Perugia, Italy
| | - Alceo Macchioni
- Dipartimento di Chimica, Università degli Studi di Perugia, via Elce di Sotto 8, I-06123 Perugia, Italy
| | - Daniele Zuccaccia
- Dipartimento di Chimica, Università degli Studi di Perugia, via Elce di Sotto 8, I-06123 Perugia, Italy
| | - Cristiano Zuccaccia
- Dipartimento di Chimica, Università degli Studi di Perugia, via Elce di Sotto 8, I-06123 Perugia, Italy
| |
Collapse
|
47
|
Rocchigiani L, Bellachioma G, Ciancaleoni G, Crocchianti S, Laganà A, Zuccaccia C, Zuccaccia D, Macchioni A. Anion-Dependent Tendency of Di-Long-Chain Quaternary Ammonium Salts to Form Ion Quadruples and Higher Aggregates in Benzene. Chemphyschem 2010; 11:3243-54. [DOI: 10.1002/cphc.201000530] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
48
|
Zuccaccia D, Belpassi L, Rocchigiani L, Tarantelli F, Macchioni A. A Phosphine Gold(I) π-Alkyne Complex: Tuning the Metal−Alkyne Bond Character and Counterion Position by the Choice of the Ancillary Ligand. Inorg Chem 2010; 49:3080-2. [DOI: 10.1021/ic100093n] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
49
|
Rocchigiani L, Zuccaccia C, Zuccaccia D, Macchioni A. Self-aggregation tendency of zirconocenium ion pairs which model polymer-chain-carrying species in aromatic and aliphatic solvents with low polarity. Chemistry 2008; 14:6589-92. [PMID: 18576401 DOI: 10.1002/chem.200800818] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Luca Rocchigiani
- Dipartimento di Chimica, Università di Perugia, Via Elce di Sotto-8, Perugia, Italy
| | | | | | | |
Collapse
|