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Maiola ML, Buss JA. Accessing Ta/Cu Architectures via Metal-Metal Salt Metatheses: Heterobimetallic C-H Bond Activation Affords μ-Hydrides. Angew Chem Int Ed Engl 2023; 62:e202311721. [PMID: 37831544 DOI: 10.1002/anie.202311721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 10/12/2023] [Accepted: 10/13/2023] [Indexed: 10/15/2023]
Abstract
We employ a metal-metal salt metathesis strategy to access low-valent tantalum-copper heterometallic architectures (Ta-μ2 -H2 -Cu and Ta-μ3 -H2 -Cu3 ) that emulate structural elements proposed for surface alloyed nanomaterials. Whereas cluster assembly with carbonylmetalates is well precedented, the use of the corresponding polyarene transition metal anions is underexplored, despite recognition of these highly reactive fragments as storable sources of atomic Mn- . Our application of this strategy provides structurally unique early-late bimetallic species. These complexes incorporate bridging hydride ligands during their syntheses, the origin of which is elucidated via detailed isotopic labelling studies. Modification of ancillary ligand sterics and electronics alters the mechanism of bimetallic assembly; a trinuclear complex resulting from dinuclear C-H activation is demonstrated as an intermediate en route to formation of the bimetallic. Further validating the promise of this rational, bottom-up approach, a unique tetranuclear species was synthesized, featuring a Ta centre bearing three Ta-Cu interactions.
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Affiliation(s)
- Michela L Maiola
- Willard Henry Dow Laboratory, Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109, USA
| | - Joshua A Buss
- Willard Henry Dow Laboratory, Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109, USA
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2
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Scattolin T, Tonon G, Botter E, Guillet SG, Tzouras NV, Nolan SP. Gold(I)-N-Heterocyclic Carbene Synthons in Organometallic Synthesis. Chemistry 2023; 29:e202301961. [PMID: 37463071 DOI: 10.1002/chem.202301961] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/14/2023] [Accepted: 07/17/2023] [Indexed: 07/20/2023]
Abstract
The prominent role of gold-N-heterocyclic carbene (NHC) complexes in numerous research areas such as homogeneous (photo)catalysis, medicinal chemistry and materials science has prompted organometallic chemists to design gold-based synthons that permit access to target complexes through simple synthetic steps under mild conditions. In this review, the main gold-NHC synthons employed in organometallic synthesis are discussed. Mechanistic aspects involved in their synthesis and reactivity as well as applications of gold-NHC synthons as efficient pre-catalysts, antitumor agents and/or photo-emissive materials are presented.
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Affiliation(s)
- Thomas Scattolin
- Dipartimento di Scienze Chimiche, Università degli studi di Padova, via Marzolo 1, 35131, Padova, Italy
| | - Giovanni Tonon
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Campus Scientifico, Via Torino 155, 30174, Venezia-Mestre, Italy
| | - Eleonora Botter
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Campus Scientifico, Via Torino 155, 30174, Venezia-Mestre, Italy
| | - Sebastien G Guillet
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, S-3, 9000, Ghent, Belgium
| | - Nikolaos V Tzouras
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, S-3, 9000, Ghent, Belgium
| | - Steven P Nolan
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, S-3, 9000, Ghent, Belgium
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3
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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] [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.
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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.
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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] [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
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Widemann M, Jeggle S, Auer M, Eichele K, Schubert H, Sindlinger CP, Wesemann L. Hydridotetrylene [Ar*EH] (E = Ge, Sn, Pb) coordination at tantalum, tungsten, and zirconium. Chem Sci 2022; 13:3999-4009. [PMID: 35440987 PMCID: PMC8985505 DOI: 10.1039/d2sc00297c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 02/21/2022] [Indexed: 12/19/2022] Open
Abstract
In a reaction of tantalocene trihydride with the low valent aryl tin cation [Ar*Sn(C6H6)][Al(OC{CF3}3)4] (1a) the hydridostannylene complex [Cp2TaH2–Sn(H)Ar*][Al(OC{CF3}3)4] (2) was synthesized. Hydride bridged adducts [Cp2WH2EAr*][Al(OC{CF3}3)4] (E = Sn 3a, Pb 3b) were isolated as products of the reaction between Cp2WH2 and cations [Ar*E(C6H6)][Al(OC{CF3}3)4] (E = Sn 1a, Pb 1b). The tin adduct 3a exhibits a proton migration to give the hydridostannylene complex [Cp2W(H)
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Sn(H)Ar*][Al(OC{CF3}3)4] 4a. The cationic complex 4a is deprotonated at the tin atom in reaction with base MeNHC at 80 °C to give a hydrido-tungstenostannylene [Cp2W(H)SnAr*] 5a. Reprotonation of metallostannylene 5a with acid [H(Et2O)2][BArF] provides an alternative route to hydridotetrylene coordination. Complex 4a adds hydride to give the dihydrostannyl complex [Cp2W(H)–SnH2Ar*] (7). With styrene 4a shows formation of a hydrostannylation product [Cp2W(H)Sn(CH2CH2Ph)Ar*][Al(OC{CF3}3)4] (8). The lead adduct 3b was deprotonated with MeNHC to give plumbylene 5b [Cp2W(H)PbAr*]. Protonation of 5b with [H(Et2O)2][Al(OC{CF3}3)4] at −40 °C followed by low temperature NMR spectroscopy indicates a hydridoplumbylene intermediate [Cp2W(H)Pb(H)Ar*]+ (4b). Hydrido-tungstenotetrylenes of elements Ge (5c), Sn (5a) and Pb (5b) were also synthesized reacting the salt [Cp2W(H)Li]4 with organotetrylene halides. The metallogermylene [Cp2W(H)GeAr*] (5c) shows an isomerization via 1,2-H-migration to give the hydridogermylene [Cp2WGe(H)Ar*] (9), which is accelerated by addition of AIBN. 9 is at rt photochemically transferred back to 5c under light of a mercury vapor lamp. Zirconocene dihydride [Cp2ZrH2]2 reacts with tin cation 1a to give the trinuclear hydridostannylene adduct 10 [({Cp2Zr}2{μ-H})(μ-H)2μ-Sn(H)Ar*][Al(OC{CF3}3)4]. Deprotonation of 10 was carried out using benzyl potassium to give neutral [({Cp2Zr}2{μ-H})(μ-H)μ-Sn(H)Ar*] (11). 11 was also obtained from the reaction of low valent tin hydride [Ar*SnH]2 with two equivalents of [Cp2ZrH2]2. The trihydride Ar*SnH3 reacts with half of an equivalent of [Cp2ZrH2]2 under evolution of hydrogen and formation of a dihydrostannyl complex 13 [Cp2Zr(μ-H)SnH2Ar*]2 and with further equivalents of Ar*SnH3 to give bis(hydridostannylene) complex [Cp2Zr{Sn(H)Ar*}2]. Low valent cations of tin and lead were used to form hydridotetrylene coordination compounds. The mobility of the hydrogen substituent was investigated in deprotonation equilibria as well as in 1,2-H-shift reactions.![]()
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Affiliation(s)
- Max Widemann
- Institut für Anorganische Chemie Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Sebastian Jeggle
- Institut für Anorganische Chemie Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Maximilian Auer
- Institut für Anorganische Chemie Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Klaus Eichele
- Institut für Anorganische Chemie Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Hartmut Schubert
- Institut für Anorganische Chemie Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Christian P Sindlinger
- Institut für Anorganische Chemie, RWTH Aachen University Landoltweg 1a D-52074 Aachen Germany
| | - Lars Wesemann
- Institut für Anorganische Chemie Auf der Morgenstelle 18 72076 Tübingen Germany
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Townrow OPE, Duckett SB, Weller AS, Goicoechea JM. Zintl cluster supported low coordinate Rh( i) centers for catalytic H/D exchange between H 2 and D 2. Chem Sci 2022; 13:7626-7633. [PMID: 35872810 PMCID: PMC9242017 DOI: 10.1039/d2sc02552c] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Accepted: 06/08/2022] [Indexed: 12/19/2022] Open
Abstract
We describe the synthesis of the coordinatively unsaturated Zintl clusters [Rh(L){η3-Ge9(Hyp)3}] (where L = PMe3, PPh3, IMe4 or [W(Cp)2H2]). These species are active catalysts in H/D exchange and C–H bond activation reactions.
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Affiliation(s)
- Oliver P. E. Townrow
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | | | | | - Jose M. Goicoechea
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK
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Zhou H, Bai T, Pan Y, Wei Y, Wang T. Facile synthesis of air-stable heterobimetallic osmium-silver hydride complexes. Dalton Trans 2021; 50:12093-12097. [PMID: 34519739 DOI: 10.1039/d1dt02619d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and characterization of air-stable heterobimetallic Os-Ag hydrides are described. All of the new heterobimetallic Os-Ag hydrides are neutral, and the in situ generated and presynthesized cis-[Os](H)-CC-R units in these frameworks act as organometallic bidentate chelating ligands coordinating with the AgPPh3 cation, which makes these complexes more stable. Our results provide a new synthetic route for the construction of stable heterobimetallic complexes.
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Affiliation(s)
- Haiyu Zhou
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China.
| | - Tongtong Bai
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China.
| | - Yanlin Pan
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China.
| | - Yongliang Wei
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China.
| | - Tongdao Wang
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China.
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8
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Park G, Gabbaï FP. The Elusive Au(I)···H-O Hydrogen Bond: Experimental Verification. J Am Chem Soc 2021; 143:12494-12498. [PMID: 34369751 DOI: 10.1021/jacs.1c07035] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Our long-standing interest in atypical bonding situations has recently led us to target complexes in which a metallobasic gold(I) center is hydrogen-bonded to a nearby OH functionality. Here, we report on the synthesis and characterization of two neutral gold(I) indazol-3-ylidene complexes bearing a carbinol or silanol group at the 4-position. As indicated by X-ray diffraction, 1H NMR spectroscopy, IR spectroscopy, and extensive computational modeling, the OH group of these derivatives is engaged in a bona fide Au···H-O interaction. In addition to shedding light on an elusive bonding situation, these results also indicate that increasing the acidity of the OH functionality is not necessarily beneficial to the stability of the Au(I)···H-O interaction.
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Affiliation(s)
- Gyeongjin Park
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - François P Gabbaï
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
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9
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Rocchigiani L, Bochmann M. Recent Advances in Gold(III) Chemistry: Structure, Bonding, Reactivity, and Role in Homogeneous Catalysis. Chem Rev 2020; 121:8364-8451. [DOI: 10.1021/acs.chemrev.0c00552] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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
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