J. Bergman, L. Engman
Nov 20, 1979
Citations
0
Influential Citations
27
Citations
Journal
Journal of Organometallic Chemistry
Abstract
Abstract The molecular structure of 8-ethoxy-4-cyclooctenyltellurium trichloride has been determined from three-dimensional X-ray diffraction data. The crystal belongs to the monoclinic system, space group P 2 1 / n , with four formula units in a cell of dimensions: a 7.712(1), b 13.406(3), c 13.820(2) A and β 95.18(1)°. The structure was solved by the conventional heavy atom method, and refined by the least-squares procedure to R = 0.025 for 2199 reflections. The compound is formed from the corresponding β-chloroalkyltellurium tri-chloride, obtained from TeCl 4 and cis , cis -1,5-cyclooctadiene, by an unusually mild solvolytic substitution reaction in ethanol. Similar β-chloroalkyltellurium compounds are postulated as intermediates in the TeO 2 oxidation of alkenes to alkanediol diacetates and alkanediol monoacetates in HOAc containing a lithium halide, LiX. Oxidation of cis -2-butene and trans -2-butene with TeO 2 /HOAc/LiBr gave a high preference for cis -stereochemistry in the products while 1-decene showed no stereospecificity.