Insertion Reactions of Heterocumulenes with Zincocene Cp*2Zn

Zincocene Cp*2Zn reacts with carbodiimides C(NR)2 with insertion into the ZnCp* bond and formation of [(Cp*C(NR)2]2Zn [R = Et (1), iPr (2), Cy (3)]. In addition, the reaction of Cp*2Zn with CS2 under dry conditions gives (Cp*CS2)2Zn (4), whereas in the presence of a small amount of water [Zn4(mu 4-O)(S2CCp*)6] (5) is obtained. Compounds 14 were characterized by NMR (1H, 13C) and IR spectroscopy as well as elemental analysis and single-crystal X-ray diffraction (24, 5 of poor quality). The solid-state structure of 5 is comparable to the carboxylate complex previously obtained from the reaction of Cp*2Zn with CO2.