Investigating intermolecular bonding in diphenylbismuth(III) chalcogenolates: X-ray crystal structures of (Ph2BiSR′) (R′=Ph; 2,6-Me2C6H3)
作者:Glen G. Briand、Andreas Decken、Nicole M. Hunter、Graham M. Lee、Jennifer A. Melanson、Evan M. Owen
DOI:10.1016/j.poly.2011.11.011
日期:2012.1
The reaction of Ph2BiCl with (PhS)Li or (2,6-Me2C6H3S)Li yielded [Ph2BiSPh](infinity), (7) or Ph2BiS(2,6-Me2C6H3)] (8), respectively. Both compounds have been characterized by elemental analysis, melting point, FT-IR, FT-Raman, solution H-1 and C-13H-1) NMR, and X-ray crystallography. The solid-state structure of 7 is polymeric via long intermolecular Bi center dot center dot center dot S interactions and mu-SPh groups, yielding a distorted psi-trigonal bipyramidal C2S2 bonding environment for bismuth. Increasing steric bulk at the phenyl thiolate ligand in 8 results in the isolation of a monomeric species, which exhibits a distorted psi-tetrahedral C2S bonding environment for bismuth. Comparison to previously reported structures of diorganobismuth chalcogenolates shows the effect of altering the chalcogen on intermolecular Bi center dot center dot center dot E (E = O, S, Se) bond formation. OFT calculations are employed to rationalize the bonding environments at bismuth and the observed polymeric structures. This work represents the first examples of structurally characterized R2BiSR' species and advances our understanding of intermolecular bonding in bismuth chalcogenolates. (C) 2011 Elsevier Ltd. All rights reserved.