N. Kuhn et al., IMIDAZOLE DERIVATIVES .11. (C8H14N2)M(CO) 5 (M=MO, W) - TERMINAL COORDINATION OF AN OLEFIN IN PENTACARBONYL METAL-COMPLEXES, Chemische Berichte, 127(8), 1994, pp. 1405-1407
The 2-methylenimidazoline complexes (C8H14N2)M(CO)5 (M = Mo, W; 6) are
obtained from M(CO)6 and 1,3,4,5-tetra-methyl-2-methyleneimidazoline
(5). Spectroscopic data reveal the strong donor character of the ylidi
c ligand in 6. The end-on coordination mode of the olefin is demonstra
ted by an X-ray structure analysis of 6a.