Abstract
Reversible cyclometalation is demonstrated as a strategy for the activation of small protic molecules, with a proof-of-principle catalytic application in the dehydrogenation of formic acid in the absence of an exogenous base. The well-defined RhI complex Rh(CO)(L) 1, bearing the reactive cyclometalated PN(C) ligand L (LH = PNCH = 2-di(tert-butylphosphinomethyl)-6-phenylpyridine),
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