225518-69-4Relevant articles and documents
Synthesis and characterization of triphenyl- and tri-n-butyltin pentafluorobenzoates, -phenylacetates and -cinnamates. X-ray structure determination of tri-n-butyltin pentafluorocinnamate
Willem, Rudolph,Bouhdid, Abdeslam,Biesemans, Monique,Martins, Jose C.,De Vos, Dick,Tiekink, Edward R.T.,Gielen, Marcel
, p. 203 - 212 (2007/10/03)
A crystal structure analysis of F5C6-CH = CH-COOSnBu3 shows that the compound is polymeric because of the presence of bidentate carboxylate ligands bridging two tin atoms in trans-R3SnO2 arrangement. This results in a five-coordinated trigonal-bipyramidal geometry around the tin atom with two apical oxygen atoms and three equatorial butyl groups. Moessbauer and CP-MAS 117Sn NMR data for triphenyl- and tri-n-butyltin pentafluorobenzoates, -phenylacetates and cinnamates, taking the X-ray structure of F5C6-CH=CH-COOSnBu3 as a reference, converge to similar polymeric five-coordinated structures in the solid state. In contrast, 13C and 119Sn NMR data in chloroform solution unambiguously indicate tetrahedral four-coordination at tin for all compounds. Failing aromatic 13C chemical shift increments and complex nJ(13C-19F) multiplet patterns necessitated recording of 2D 19F-13C HMQC spectra in order to fully characterize the new compounds in solution.
