Abstract
Oxidation of the isomeric cyclodiphosph(III)azanes, (Me 2 NPNBu-t) 2, by selenium and by tellurium gives both isomeric monoselenides but only one monotelluride. Variable temperature 1H and 31P NMR studies provide evidence for restricted rotation about the exocyclic PN bonds, and in the telluride, of exchange of tellurium between the phosphorus atoms.
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