Platinum-Templated Coupling of B=N Units: Synthesis of BNBN Analogues of 1,3-Dienes and a Butatriene.

ABSTRACT: The 1:2 reaction of [μ-(dmpm)Pt(nbe)]₂ (dmpm=bis(dimethylphosphino)methane, nbe=norbornene) with Cl₂ BNR(SiMe₃ ) (R=tBu, SiMe₃ ) yields unsymmetrical (N-aminoboryl)aminoboryl Pt^I ₂ complexes by B-N coupling via ClSiMe₃ elimination. A subsequent intramolecular ClSiMe₃ elimination from the tBu-derivative leads to cyclization of the BNBN unit, forming a unique 1,3,2,4-diazadiboretidin-2-yl ligand. In contrast, the analogous reaction with Br₂ BN(SiMe₃ )₂ leads, via a twofold BrSiMe₃ elimination, to a Pt^II ₂ A-frame complex bridged by a linear BNBN isostere of butatriene. Structural and computational data confirm π electron delocalization over

SUBMITTER: Brunecker C 

PROVIDER: S-EPMC8362192 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature