Nickel-catalyzed synthesis of Zn(i)-Zn(i) bonded compounds
Résumé
This work reports the first catalyzed synthesis of d-block metal-metal bonded complexes. The treatment of terminal zinc hydrides [LZnH] [L = CH3C(2,6-(Pr2C6H3N)-Pr-i)CHC(CH3)(N(CH2)(n)CH2PR2); n = 1, 2; R = Ph, Pr-i] in the presence of 5 mol% Ni(CO)(2)(PPh3)(2) afforded Zn(i)-Zn(i) bonded compounds [L2Zn2] in high isolated yields with concomitant elimination of dihydrogen. Stoichiometric reactions, kinetic studies and DFT calculations were conducted to elucidate the reaction mechanism.