Gaseous NO as the source of nitrosyl ligand in carbonyl clusters. X-Ray structure of [Ru6C(CO)14(C3H5)(NO)] and fluxionality of the µ-allyl ligand

Abstract

Nitric oxide gas reacts with an anionic carbonyl cluster of ruthenium, [Ru₃(CO)₉C₂R]^–(R = Bu^t or SiMe₃), to give the neutral nitrosyl complex [Ru₃(CO)₉C₂R(NO)], while the reactions with the dianionic carbide cluster [Ru₆C(CO)₁₆]^2– and its monoanionic µ–η³-allyl derivative, [Ru₆C(CO)₁₅(C₃H₅)]^–, give good yields of monoanionic [Ru₆C(CO)₁₅(NO)]^– and neutral [Ru₆C(CO)₁₄(C₃H₅)(NO)] complexes, respectively; the latter complex is unique in exhibiting fluxionality of the µ-allyl ligand.