Tuning a Metal's Oxidation State: The Potential of Clathrochelate Systems


  • The authors gratefully acknowledge support of the Russian Foundation for Basic Research (grant nos. 03-03-32214, 03-03-32531, and 04-03-32206) and the Russian Science Support Foundation.


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A grip on what's inside: A clathrochelate ligand controls the oxidation state of the encapsulated cobalt ion in complex 1. This complex can be reduced chemically in acetonitrile solution by treatment with silver in the presence of tetraalkylammonium or tetra(dimethylamido)phosphonium halides to the dark-blue reduced complex [(NMe2)4P]-1 in high yield (see scheme).