Chelate Complexes with Triisocyanide Ligands

Isocyanide and chelate complexes have medical implications. Chelate complexes containing di- and triisocyanide could not, however, be synthesized in the past because of the extreme ring strain in the almost linear MC NR unit. With novel triisocyanide ligands (1 (sketched on the right), and (N(CH2CH2CH2NC)3) an only slightly distorted octahedral complex of composition [(L)M(CO)3] (M = Cr, Mo, W) was obtained.