Dinitrosylmolybdenum Complexes with Anion Ligands Coordinating by Oxygen Atoms. Synthesis, Electronic Structure and Olefin Metathesis Activity of Carboxylato-Dinitrosyl-Molybdenum Complexes

The new carboxylato-dinitrosyl-molybdenum complexes o f the formula: [M o(NO )2( 0 2CMe)2] • MeOH, N a2[M o(NO)2( 0 2CMe)4] and M o(N O )2( 0 2CPh)2 have been synthesized. Their structure was resolved on the basis o f spectroscopic investigations ('H N M R , IR, U V -V IS ). Catalytic activity o f these complexes in olefin metathesis reaction was also examined. The electronic structure o f dinitrosyl-molybdenum complexes with ligands coordinating by oxygen atoms was calculated for the example o f the diand tetra-acetato-dinitrosyl-molybdenum complexes using the Fenske-Hall and INDO methods. To interpret the spectroscopic properties (U V -V IS ) within the method o f interaction configuration, the electronic structure o f the excited states was calculated.