TY - BOOK AU - Berry,John F. TI - Metal–metal multiple bonded intermediates in catalysis SN - 09743626 AV - QD31 JOU PY - 2015/// CY - Bangalore PB - Sprinter KW - Catalysis KW - Metal-metal bonds KW - Carbene N2 - Metal–metal bonded Rh2 and Ru2 complexes having a paddlewheel-type structure are exceptional catalysts for a broad range of organic transformations. I review here the recent efforts towards the observation and characterization of intermediates in these reactions that have previously eluded detection. Specifically, mechanistic investigations of carbenoid and nitrenoid reactions of Rh2(II,II)-tetracarboxylate compounds have led to the observation of a metastable Rh2(II,II) carbene complex as well as a mixed-valent Rh2(II,III)-amido intermediate. Related Ru2 nitrido compounds have been studied and found to undergo intramolecular C–H amination reactions as well as intermolecular reaction with triphenylphosphine UR - https://doi.org/10.1007/s12039-015-0773-6 ER -