Stereochemically Nonrigid Organometallic Molecules, XXXII. The Rearrangement of Trimethylgermyl-N-Pyrazolides and N-Imidazolides

Abstract

Several trimethylgermyl-N-heterocycles, containing N-pyrazolyl and N-imidazolyl groups, have been prepared. The imidazole compounds are new. The substituted and unsubstituted pyrazolides display temperature dependent NMR spectra above room temperature. This is attributed to reversible 1,2 shifts of the trimethylgermyl group. The imidazolide derivatives are stereochemically rigid molecules showing slightly temperature dependent chemical shifts.