SYNTHESIS, STRUCTURE CHARACTERIZATION AND TRANSESTERIFICATION OF THE COMPLEXES OF BETA-ALKOXYCARBONYLETHYLTIN TRICHLORIDES

Thirteen title complexes ROCOCH2CH2SnCl3 . L(R = C(1 similar to 5)alky l;L = DBSO,HMPA) were synthesized and characterized by elemental analy sis, IR,H-1 NMR. The crystal structure of n -PrOCOCH2CH2SnCl3 . DBSO w as determined by the X-ray diffraction analysis. The crystal belongs t o orthorhombic system,space group P2(1)2(1)2(1) with a = 1.062, b = 1. 427, c = 1.635nm; Z = 4. The complex exists as a discrete molecule, an d the tin atom attains a distorted octahedral geometry via the coordin ation of intramolecular carbonyl oxygen and the Lewis base donor atom. The transesterification of CH3OCOCH2CH2SnCl3 . L with alcohol was stu died, and the intramolecular Lewis acid catalytic mechanism was sugges ted.