INVESTIGATIONS INTO TIN(IV) ALKOXIDES .1. CRYSTAL AND MOLECULAR-STRUCTURE OF TIN(IV)-ISOPROPOXIDE-ISOPROPANOL SOLVATE, SN(OIPR)4 I-PROH

The isopropanol complex of tin(IV)-isopropoxide has been prepared by the reaction ot tin tetrachloride with sodium isopropoxide. The compound forms colourless, moisture sensitive crystals, which in dry air easily release the coordinated solvent molecules. The crystal and molecular structure of Sn(O(i)Pr)4 . i-PrOH has been determinated by single crystal X-ray diffraction. The compound crystallizes in the monoclinic space group P2(1)/c with a = 1174.2(5), b = 1428.5(3), c = 1234.1(3) pm, beta = 95.37(1)-degrees and Z = 4. The crystal structure consists of discrete, dimeric molecules in which the two tin atoms are bridged by two alkoxide groups. The octahedral coordination sphere of each tin atom is completed by one solvent molecule which, in addition, forms one hydrogen bridge to an alkoxide group of the neighboring tin atom.