Synthesis Of New Antimony(Ⅲ) And Bismuth(Ⅲ) Co-Mplexes Bearing A Bis(amido)silane Ligand

Antimony and bismuth were the fifth main group metal eleme-nts, and their complexes were used in many areas such as org-anic synthesis, catalysis and biomedicine. Antimony and bismuthhave speciaI electrons with structural diversity, they often exhibita highly coordination number with variable coordina-tion geometry.In the past years, antimony（Ⅲ） and bismum（Ⅲ） chemistry hadbeen widely developed. In particular, their organic complexes bi-nding with the carbon anion （C-） had been researched and appliedin organic synthesis and catalysis for many years. But the compl-exes binding with nitrogen anion （N-） were relatively less synthes-ized,so the bulked bisamidosilane ligand with N-ion was selectedto stablize antimony（Ⅲ） and bismum（Ⅲ） atoms in this paper. The-refore, the two synthesized antimony（Ⅲ） and bismum（Ⅲ） complex-es had the important scientific signifcance and potential applicat -ions in the antimony and bismum chemistry.Novel antimony（Ⅲ） and bismum（Ⅲ） complexes were synthesiz-ed based on bulked new bis（amido）silane ligand containing double N-ion. Two complexes such as Me2Si（DippN）₂MX（M=Sb、Bi;X=Cl,Br;Dipp=2,6-iPr₂C₆H₃） had been prepared with the precursorsof Ph₂Si（DippNH）₂and [Ph₂Si（DippNLi）₂]₂which contained doubleN-ion. It was the frist time to introduce the ligand to stableantimony（Ⅲ） and bismum（Ⅲ） complexes, which were air and mo-isture sensitive.Ph₂Si（DippN）₂SbCl and Ph₂Si（DippN）₂BiBr wereprepared through the salt elimination reaction with Ph₂Si（DippNLi）₂]₂, SbCl3and BiBr3.The structure of [Ph₂Si（DippNLi）₂]₂was th-e dinuclear product, and the others were monomeric state.Allof the structures of the complexes were characterized by NMR,IR and x-ray single crystal diffusion. In addition, antimony chlo-ride and bismuth bromine complexes which were excellent ma-terials had been used to synthesize the complexes of Sb-CH₃,Bi-CH₃, Bi–Bi and B-[B（Ph）₄].