Fr. Kreiss et al., CYCLOADDITION OF AZIDOFORMIC ACID METHYLE STER TO THE METAL-CARBON DOUBLE-BOND OF ETA(2)-THIOCARBENE COMPLEXES OF MOLYBDENUM AND TUNGSTEN, Zeitschrift fur Naturforschung. B, A journal of chemical sciences, 48(11), 1993, pp. 1481-1487
Cationic eta2-thiocarbene complexes of molybdenum and tungsten [CP(CO)
PMe3M=C(R) Me][BF4] (R = Me, Ph, Tol) add N3COOMe to the electron rich
metal carbon double bond to yield the corresponding bicyclic system.
The products have been characterized by H-1, C-13, P-31 NMR, IR and ma
ss spectra. The crystal structure of 4b has been determined: space gro
up P2(1)/n with a = 1749.9(7), b = 827.9(1), c = 1846.8(7) pm and Z =
4.