Kinetics and mechanisms of chromium(II)-catalyzed nitrosyl ligand transfer reactions

Nitrosyl Transfer from Manganese to Iron in Tropocoronand Complexes

“…Since then, two general mechanisms have been advanced for this overall reaction (eqs 2 and 3) In the first case, formation of a nitrosyl-bridged dimetallic intermediate facilitates direct transfer of NO from one metal center to another. − Evidence for this mechanism was based mostly on product analysis and the observation that coordinatively unsaturated acceptors were favored . Detailed kinetic analysis of NO transfer between cobalt dimethylglyoximate complexes and hemoglobin revealed that dissociation of nitric oxide (eq 3) from cobalt leads to NO transfer to hemoglobin. , This result suggested that such a mechanism might generally describe NO transfer between metal centers. , …”

Why intermolecular nitric oxide (NO) transfer? Exploring the factors and mechanistic aspects of NO transfer reaction

“…25e Further studies suggest the transfer of the NO ligand at high acidic conditions due to axial NO ligand protonation. 26 Caulton and co-workers, in a study of NO transfer reactivity from Co to various metal complexes of Fe, Ru, Rh, and Co complexes, proposed that the NO transfers readily to the coordinatively unsaturated metal complexes, either via a simple NO transfer or via halide exchange pathway. 25c Mu and Kadish speculated the effect of metal-center on a NO transfer reaction.…”