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Additive Effects in Metal/Lewis Acid Cooperativity Assessed in a Tetrahedral Copper Hydrazine Complex Featuring an
Emily E Norwine1, John J Kiernicki2, Matthias Zeller3
1Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States.
Abstract:
Within metal/ligand cooperative systems employing acidic groups, studies that empirically assess distance relationships are needed to maximize cooperative interactions with substrates. We report the formation of two Cu(I)-N2H4 complexes using 1,4,7-triazacyclononane ligand frameworks bearing two tert-butyl groups and either a Lewis acidic trialkylborane or an inert alkyl group. Metal/Lewis acid cooperativity imparts heightened acidification of the hydrazine substrate and plays a key role in the release of substrate to a competitive Lewis acidic group.
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