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Clapson ML, Dilinaer AD, Lanaque TCQ, Zurakowski JA, Austen BJH, Drover MW. Ynone Co-Coordination at a Nickel Borane Complex: An Assessment of Secondary Coordination Sphere Effects. Inorg Chem 2024; 63:6184-6191. [PMID: 38546051 DOI: 10.1021/acs.inorgchem.3c04264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
Secondary coordination sphere ligand effects can be used to direct or organize small molecule substrates at a metal center. Herein, we assess the bifunctional ambiphilic diphosphine, tri-tert-butylboranyldiphosphinoethane (ttbbpe) and its ability to influence stereoselective substrate coordination, while appended to nickel. This report takes a synthetic/computational approach to test the impacts and limitations associated with ligand-directed substrate coordination using [Ni(ttbbpe)(η2:η2-COD)] (COD = 1,5-cyclooctadiene) and ynones (alkynes having an α-carbonyl group at the propargylic position) as model substrates.
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Affiliation(s)
- Marissa L Clapson
- Department of Chemistry and Biochemistry, University of Windsor, 401 Sunset Avenue, Windsor, Ontario N9B 3P4, Canada
| | - A Dina Dilinaer
- Department of Chemistry, Western University, 1151 Richmond Street, London, Ontario N8K 3G6, Canada
| | - Trisha C Q Lanaque
- Department of Chemistry and Biochemistry, University of Windsor, 401 Sunset Avenue, Windsor, Ontario N9B 3P4, Canada
| | - Joseph A Zurakowski
- Department of Chemistry and Biochemistry, University of Windsor, 401 Sunset Avenue, Windsor, Ontario N9B 3P4, Canada
- Department of Chemistry, Western University, 1151 Richmond Street, London, Ontario N8K 3G6, Canada
| | - Brady J H Austen
- Department of Chemistry and Biochemistry, University of Windsor, 401 Sunset Avenue, Windsor, Ontario N9B 3P4, Canada
- Department of Chemistry, Western University, 1151 Richmond Street, London, Ontario N8K 3G6, Canada
| | - Marcus W Drover
- Department of Chemistry and Biochemistry, University of Windsor, 401 Sunset Avenue, Windsor, Ontario N9B 3P4, Canada
- Department of Chemistry, Western University, 1151 Richmond Street, London, Ontario N8K 3G6, Canada
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2
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Durfy CS, Zurakowski JA, Jobin G, Drover MW. An Investigation of Allyl-Substituted Bis(Diphosphine) Iron Complexes: Towards Precursors for Cooperative CO 2 Activation. Chemistry 2024; 30:e202302721. [PMID: 37724786 DOI: 10.1002/chem.202302721] [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: 08/19/2023] [Revised: 09/18/2023] [Accepted: 09/19/2023] [Indexed: 09/21/2023]
Abstract
In developing homogenous catalysts capable of CO2 activation, interaction with a metal center is often imperative. This work provides primary efforts towards the cooperative activation of CO2 using a Lewis acidic secondary coordination sphere (SCS) and iron via a paired theoretical/experimental approach. Specifically, this study reports efforts towards [Fe(diphosphine)2 (N2 )] as a CO2 -coordinated synthon where diphosphine=1,2-bis(di(3-cyclohexylboranyl)propylphosphino)ethane) (P2 BCy 4 ) or its precursor, 1,2-bis(diallylphosphino)ethane (tape). Initial efforts toward the {Fe(0)-N2 } complex were focused on deprotonation reactions of [Fe(diphosphine)2 (H)(NCCH3 )]+ and reduction of [Fe(tape)2 Cl2 ]. In the latter case, a mixture of intramolecularly π-bonded alkene and associated metallacyclic Fe(II)-H species were produced - heating this mixture provided the hydride as the major product. Notably, the interconversion of this pair counters that of related intermolecular reactions between [Fe(depe)2 ] (depe=1,2-bis(diethylphosphino)ethane) and ethylene, where hydride formation occurs subsequent to π-coordination; this has been probed by theoretical calculations. Finally, reactivity of the metallacyclic {Fe(II)-H} complex with CO2 was probed, resulting in a pair of isomeric ferra(II)lactones.
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Affiliation(s)
- Connor S Durfy
- Department of Chemistry and Biochemistry, University of Windsor, 401 Sunset Avenue, Windsor, ON, N9B 3P4, Canada
- Department of Chemistry, Western University, 1151 Richmond Street, London, ON, N6A 3K7, Canada
| | - Joseph A Zurakowski
- Department of Chemistry and Biochemistry, University of Windsor, 401 Sunset Avenue, Windsor, ON, N9B 3P4, Canada
- Department of Chemistry, Western University, 1151 Richmond Street, London, ON, N6A 3K7, Canada
| | - Gabriel Jobin
- Department of Chemistry and Biochemistry, University of Windsor, 401 Sunset Avenue, Windsor, ON, N9B 3P4, Canada
- Department of Chemistry, Western University, 1151 Richmond Street, London, ON, N6A 3K7, Canada
| | - Marcus W Drover
- Department of Chemistry and Biochemistry, University of Windsor, 401 Sunset Avenue, Windsor, ON, N9B 3P4, Canada
- Department of Chemistry, Western University, 1151 Richmond Street, London, ON, N6A 3K7, Canada
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3
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Raje S, Koner A, Ghosh S, Butcher RJ, Mathivathanan L, Sundararajan M, Angamuthu R. Late-stage Ligand Modification After Coordination Strengthens Stereoselectively Self-Assembled Hemiaminal Ether Complexes. Chem Asian J 2023; 18:e202300706. [PMID: 37655885 DOI: 10.1002/asia.202300706] [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: 08/12/2023] [Revised: 08/29/2023] [Accepted: 09/01/2023] [Indexed: 09/02/2023]
Abstract
Fragile hemiaminal ether linkages present in the backbone of koneramines (LR OR'), tridentate ligands, bound to copper(II) in stereoselectively self-assembled syn-[Cu(LR OR')X2 ] complexes were transformed into sturdy methylene linkages to make corresponding rac-[Cu(LR H)Cl2 ] complexes by late-stage ligand modification after coordination with the retention of coordination sphere. The generality of stereoselective self-assembly of koneramine complexes is shown by utilising a number of metal ions, anions, amines, alcohols and thiols with complete characterisations.
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Affiliation(s)
- Sakthi Raje
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Abhishek Koner
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Suchismita Ghosh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Ray J Butcher
- Department of Chemistry, Howard University, Washington, D.C., 20059, USA
| | - Logesh Mathivathanan
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu, 632014, India
| | - Mahesh Sundararajan
- Theoretical Chemistry Section, Chemistry Division, Bhabha Atomic Research Centre, Mumbai-400085 (India), Homi Bhabha National Institute, Mumbai, 400085, India
| | - Raja Angamuthu
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
- Department of Sustainable Energy Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
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Austen BJH, Clapson ML, Drover MW. Reactions of nickel boranyl compounds with pnictogen-carbon triple bonds. RSC Adv 2023; 13:19158-19163. [PMID: 37362339 PMCID: PMC10288830 DOI: 10.1039/d3ra02797j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 06/14/2023] [Indexed: 06/28/2023] Open
Abstract
The catalytic conversion of unsaturated small molecules such as nitriles into reduced products is of interest for the production of fine chemicals. In this vein, metal-ligand cooperativity has been leveraged to promote such reactivity, often conferring stability to bound substrate - a balancing act that may offer activation at the cost of turnover efficiency. This report describes the reactivity of a [(diphosphine)Ni] compound with pnictogen carbon triple bonds (R-C[triple bond, length as m-dash]E; E = N, P), where the diphosphine contains two pendant borane groups. For E = N, cooperative nitrile coordination is observed to afford {Ni}2 complexes displaying B-N interactions, whereas for E = P, B-P interactions are absent. This work additionally outlines a structure-activity relationship that uses nitrile dihydroboration as a model reaction to unveil the effect of SCS stabilization, employing [(diphosphine)Ni] where the diphosphine contains 0, 1, or 2 pendant Lewis acid groups.
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Affiliation(s)
- Brady J H Austen
- Department of Chemistry and Biochemistry, The University of Windsor 401 Sunset Avenue Windsor ON N9B 3P4 Canada
| | - Marissa L Clapson
- Department of Chemistry and Biochemistry, The University of Windsor 401 Sunset Avenue Windsor ON N9B 3P4 Canada
| | - Marcus W Drover
- Department of Chemistry and Biochemistry, The University of Windsor 401 Sunset Avenue Windsor ON N9B 3P4 Canada
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5
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Zurakowski JA, Brown KR, Drover MW. Secondary Coordination Sphere Alkylation Promotes Cyclometalation. Inorg Chem 2023; 62:7053-7060. [PMID: 37120856 DOI: 10.1021/acs.inorgchem.3c00427] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Diphosphines have taken on a dominant role as supporting ligands in transition-metal chemistry. Here, we describe complexes of the type [Cp*Fe(diphosphine)(X)] (X = Cl, H) where for diphosphine = 1,2-bis(di-allylphosphino)ethane (tape), a Lewis-acidic secondary coordination sphere (SCS) was installed via allyl group hydroboration using dicyclohexylborane (HBCy2). The resulting chloride complex, [Cp*Fe(P2BCy4)(Cl)] (P2BCy4 = 1,2-bis(di(3-cyclohexylboranyl)propylphosphino)ethane), was treated with n-butyllithium (1-10 equiv), resulting incyclometalation at iron. This reactivity is contrasted with [Cp*Fe(dnppe)(Cl)] (dnppe = 1,2-bis(di-n-propylphosphino)ethane), whereby addition of n-butyllithium provides a mixture of products. Overall, cyclometalation is a common elementary transformation in organometallic chemistry; here we describe how this outcome is accessed in response to Lewis acid SCS incorporation.
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Affiliation(s)
- Joseph A Zurakowski
- Department of Chemistry and Biochemistry, The University of Windsor, 401 Sunset Avenue, Windsor, Ontario N9B 3P4, Canada
| | - Kasey R Brown
- Department of Chemistry and Biochemistry, The University of Windsor, 401 Sunset Avenue, Windsor, Ontario N9B 3P4, Canada
| | - Marcus W Drover
- Department of Chemistry and Biochemistry, The University of Windsor, 401 Sunset Avenue, Windsor, Ontario N9B 3P4, Canada
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6
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Clapson ML, Sharma H, Zurakowski JA, Drover MW. Cooperative Nitrile Coordination Using Nickel and a Boron-Containing Secondary Coordination Sphere. Chemistry 2023; 29:e202203763. [PMID: 36534339 DOI: 10.1002/chem.202203763] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 12/19/2022] [Accepted: 12/19/2022] [Indexed: 12/23/2022]
Abstract
Metal-ligand cooperation has emerged as a versatile tool for substrate activation in chemical reactivity. Herein, we provide the synthesis and characterization of a monoboranyl-containing analogue of the ubiquitous bulky diphosphine ligand, 1,2-bis(di-tert-butylphosphino)ethane, whose reactivity has been examined using nickel. Together, the pairing of nickel and boron provides a platform that allows for the cooperative coordination of organonitriles, giving unusual examples of intermolecularly bound dinickelacycles.
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Affiliation(s)
- Marissa L Clapson
- Department of Chemistry and Biochemistry, The University of Windsor, 401 Sunset Avenue, Windsor, ON, N9B 3P4, Canada
| | - Harvey Sharma
- Department of Chemistry and Biochemistry, The University of Windsor, 401 Sunset Avenue, Windsor, ON, N9B 3P4, Canada
| | - Joseph A Zurakowski
- Department of Chemistry and Biochemistry, The University of Windsor, 401 Sunset Avenue, Windsor, ON, N9B 3P4, Canada
| | - Marcus W Drover
- Department of Chemistry and Biochemistry, The University of Windsor, 401 Sunset Avenue, Windsor, ON, N9B 3P4, Canada
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Nees S, Wellnitz T, Dankert F, Härterich M, Dotzauer S, Feldt M, Braunschweig H, Hering-Junghans C. On the Reactivity of Phosphaalumenes towards C-C Multiple Bonds. Angew Chem Int Ed Engl 2023; 62:e202215838. [PMID: 36516342 DOI: 10.1002/anie.202215838] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 12/11/2022] [Accepted: 12/14/2022] [Indexed: 12/15/2022]
Abstract
Heterocycles containing group 13 and 15 elements such as borazines are an integral part of organic, biomedical and materials chemistry. Surprisingly, heterocycles containing P and Al are rare. We have now utilized phosphaalumenes in reactions with alkynes, alkenes and conjugated double bond systems. With sterically demanding alkynes 1,2-phosphaalumetes were afforded, whereas the reaction with HCCH or HCCSiMe3 gave 1,4-phosphaaluminabarrelenes. Using styrene saturated 1,2-phosphaalumates were formed, which reacted further with additional styrene to give different regio-isomers of 1,4-aluminaphosphorinanes. Using ethylene, a 1,4-aluminaphosphorinane is obtained, while with 1,3-butadiene a bicyclic system containing an aluminacyclopentane and a phosphirane unit was synthesized. The experimental work is supported by theoretical studies to shed light on the mechanism governing the formation of these heterocycles.
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Affiliation(s)
- Samuel Nees
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Tim Wellnitz
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Straße 3a, 18059, Rostock, Germany
| | - Fabian Dankert
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Straße 3a, 18059, Rostock, Germany
| | - Marcel Härterich
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Simon Dotzauer
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Milica Feldt
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Straße 3a, 18059, Rostock, Germany
| | - Holger Braunschweig
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
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Wang B, Seo CSG, Zhang C, Chu J, Szymczak NK. A Borane Lewis Acid in the Secondary Coordination Sphere of a Ni(II) Imido Imparts Distinct C-H Activation Selectivity. J Am Chem Soc 2022; 144:15793-15802. [PMID: 35973127 PMCID: PMC10276360 DOI: 10.1021/jacs.2c06662] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Two borane-functionalized bidentate phosphine ligands that vary in tether length have been prepared to examine cooperative metal-substrate interactions. Ni(0) complexes react with aryl azides at low temperatures to form structurally unusual κ2-(N,N)-N3Ar adducts. Warming these adducts affords products of N2 extrusion and in one case, a Ni-imido compound that is capped by the appended borane. Reactions with 1-azidoadamantane (AdN3) provide a distinct outcome, where a proposed nickel imido intermediate activates the sp2 C-H bonds of arenes, even in the presence of benzylic C-H sites. Combined experimental and computational mechanistic studies demonstrate that the unique reactivity is a consequence of Lewis-acid-induced polarization of the Ni-NR bond, potentially providing a synthetic strategy for chemoselective reaction engineering.
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Affiliation(s)
- Baolu Wang
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 10049, P. R. China
| | - Chris S. G. Seo
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Cuijuan Zhang
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 10049, P. R. China
| | - Jiaxiang Chu
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 10049, P. R. China
| | - Nathaniel K. Szymczak
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
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