Hypervalent ate complexes are presumptive intermediates in the metal-halogen, metal- tellurium, and related exchange reactions. The effect of o, o'-biphenyldiyl vs. diphenyl substitution on formation of tellurium ate complexes was studied by a kinetic technique and by NMR spectroscopy. Only a modest increase in the association constant (Kate) was measured. When Li/M exchanges of o, o'-biphenyldiyl sulfides and selenides were made ...
