Rearrangements and stereomutations of metallacycles derived from allenes and imidozirconium complexes.

ABSTRACT: The mechanisms of the rearrangements and stereoinversion of azametallacyclobutenes generated via [2+2] cycloaddition of allenes and imidozirconium complexes have been studied. Metallacycles derived from allenes bearing beta-hydrogen atoms racemize at room temperature by reversible beta-hydride elimination, a process which is also responsible for their eventual conversion to monoazadiene complexes. Metallacycles derived from diarylallenes racemize by reversible thermal bond homolysis at 95 degrees C; racemization of these metallacycles is also catalyzed by mild oxidants.

SUBMITTER: Michael FE 

PROVIDER: S-EPMC1444910 | biostudies-literature | 2005 Feb

REPOSITORIES: biostudies-literature