Abstract
Complex lfT, [{(7-CsH3)2(SiMe2)2}Ru2(CO)4(^-H)], with a protonated Ru-Ru bond, was prepared as shown in the scheme. Although the proton in 1H* is acidic thermodynamically, it is deprotonated only very slowly (hours or days) by basic amines and phosphines. This remarkable kinetic inertness of the bridging proton allows amines to react with IFT by attacking the CO ligand to give a formamide and the CO-substituted product 2. Thus, protonation of the metal-metal bond in 1H* promotes reactions of the CO ligand that are not possible in the unprotonated 1. 1 Reproduced with permission from Journal of the American Chemical Society 2000,122, 6130-6131. Copyright 2000 American Chemical Society.
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