C. Vatsa, V. Jain, T. Kesavadas
May 14, 1991
Citations
0
Influential Citations
40
Citations
Journal
Journal of Organometallic Chemistry
Abstract
Reaction of diorganotin(IV) oxide with trimethylacetic acid in 11 stoichiometry gives {[R2Sn(O2CtBu)]2O}2 (R = Me, Et, nPr and nBu). The IR and NMR (1H, 13C and 119Sn) data indicate that these complexes adopt the dicarboxylato tetraorganodistannoxane structure. The crystal structures of the R = Me and Et compounds confirm the spectroscopic assignments but reveal different solid state structures. For the R = Et compound, each Sn atom of the central Sn2O2 stannoxane unit is linked to an exocyclic Sn atom via a carboxylate bridge; the remaining two carboxylate ligands coordinate the exocyclic Sn atom exclusively. By contrast, in the R = Me compound each of the four carboxylate ligands bridges a pair of Sn atoms leading to both five- and six-coordinate Sn geometries compared to the five-coordinate Sn geometries found in the R = Et compound.