Imidazole derivatives. XI. (C8H14N2)M(CO)5 (M = Mo, W) - terminal coordination of an olefin in pentacarbonyl metal complexes.
The 2-methyleneimidazolone complexes I (M = Mo, W) were prepd. by the reaction of M(CO)6 with 1,3,4,5-tetramethyl-2-methyleneimidazoline. Spectroscopic data reveal the strong donor character of the ylidic ligand in I. The end-on coordination mode of the olefin is demonstrated by an x-ray structure anal. of I (M = Mo).
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