First Isolation of Bicyclic Ditellurides from the Reaction of Camphor Hydrazone with Tellurium Tetrachloride.

Reaction of camphor hydrazone with TeCI₄ under basic conditions gave an isomeric mixture of vinyl ditelluride and Wagner-Meerwein rearranged ditelluride. Initially formed tellurocamphor enolized and oxidized to give vinyl telluride, whereas tellurocamphor complexed with TeC₄ to afford carbocation, which rearranged in a Wagner-Meerwein manner to afford the rearranged ditelluride. Photolysis of ditelluride in methyl methacrylate solution gave the radical polymerization product, PMMA, in which ditelluride acted as a radical initiator.