Reactions of nickel boranyl compounds with pnictogen-carbon triple bonds
Austen, B.J.H. 1 , Clapson, M.L. 2 , Drover, M.W. 1 1 University of Western Ontario, 2 University of Windsor
Diphosphine ligands have found great promise as supporting ligand scaffolds due to an ease in both primary and secondary coordination sphere (SCS) modification. These changes result in significant differences in chemical reactivity for coordinated transition elements. The present study focuses on the modification of (+/-)- rac/meso- ( t- Bu)ClP-CH 2 CH 2 -PCl( t- Bu) to create a new family of diphosphine ligands. Upon reacting this precursor with allyl magnesium chloride and subsequent hydroboration using HBCy 2 (Cy = cyclohexyl), a diboranyldiphosphinoethane ligand scaffold was generated, boasting two electrophilic boranes in its SCS. This new scaffold, along with its allyl counterpart, have been appended to Ni(0) using [Ni(COD) 2 ] (COD = 1,5-cyclooctadiene) in an attempt to determine clean methods for installation, and subsequent reactivity. As a result of having two stereogenic phosphorus centers, characterization required use of 2D NMR spectroscopy, X-ray crystallography, and density functional theory (DFT) calculations. Relevant reactivity studies of such compounds using element-carbon triple bonds will additionally be shared. References 1. Austen, B. J. H.; Sharma, H.; Zurakowski, J. A.; Drover, M.W. Organometallics 2022 , 41 , 2709-2715. DOI: 10.1021/acs. organomet.2c00336 2. Austen, B. J. H.; Clapson, M. L.;Drover, M. W. RSC Adv. 2023 ,13 , 19158–19163 . DOI:10.1039/D3RA02797J
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© The Author(s), 2023
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