Coordinated versus Noncoordinated Isocyanides: Synthesis of Complexes CH3C(CH2NC)x[CH2NC—Cr(CO)5]3‐x(x=1, 2) and Crystal Structure of CH3C(CH2NC)2[CH2NC — Cr(CO)5]

The triisocyanide ligand CH3C(CH2NC)3 reacts with Cr‐(CO)5(THF) depending on the stoichiometry to give the complexes CH3C(CH2NC)x[CH2NC—Cr(CO)5]3‐x (x=1, 2). The complex CH3C(CH2NC)2[CH2NC — Cr(CO)5] has been characterized by an X‐ray structure analysis allowing a direct comparison of the bonding parameters of coordinated and noncoordinated isocyanide ligands in the same molecule.