COMPLEX CATALYSIS. XX. NITROSYLMOLYBDENUM COMPLEXES PRECATALYSTS FOR OLEFIN METHATHESIS. THE FORMATION AND STABILITY OF A 0Cl(NO)>-CONTAINING INTERMEDIATE AND ITS SIGNIFICANCE FOR THE GENERATION OF THE CATALYTICALLY ACTIVE COMPLEX

Article abstract of DOI:10.1016/0022-328X(84)80243-0

The reaction of the nitrosylmolybdenum complexes Mo^IICl3(NO)(OPPh3)2 and Mo⁰Cl2(NO)2(PPh3)2 with EtAlCl2 gives a 0Cl(NO)>-containing intermediate, the formation and further reaction of which were followed by IR-spectroscopy after trapping with CO/PPh3 and Et2NC(S)S-S(S)CNEt2, respectively.The dependences on time and temperature of the formation and decomposition of the "0Cl(NO)>" intermediate were also investigated.By comparison of methathesis activity and the decay of the "0Cl(NO)>" intermediate, the latter was confirmed to be an essential catalyst precursor from which the actual methathesis catalyst, very probably a nitridomolybdenum complex, is formed.