Preparation and Properties of Cp2Zr(μ-NCAr2)2PdCl(Me), New Zr/Pd Heterobimetallic Complexes with Bridging Alkylideneamido Ligands
摘要:
Zr/Pd heterobimetallic complexes with bridging alkylideneamido ligands, Cp2Zr(mu-N=CAr2)(2)PdCl(Me) (Ar = Ph, C6H4Me-4), were prepared from the reaction of Cp2Zr(N=CAr2)(2) with PdCl(Me)(cod) (cod = 1,5-cyclooctadiene). Cp2Zr(mu-N=CAr2)(2)PdCl(Me) complexes have puckered ZrN2Pd rings with Zr-Pd distances of 2.8135(5) Angstrom (Ar = Ph) and 2.8416(4) Angstrom (Ar = C6H4Me-4), respectively. The complexes reacted with HCl to afford trans-PdCl(Me)(NH=CAr2)(2) and Cp2ZrCl2. Exposure of a CH2Cl2 solution of trans-PdCl(Me){NH=C(C6H4Me-4)(2)}(2) to light results in the formation of a mixture of cis- and trans-PdCl(CHCl2){NH=C(C6H4Me-4)(2)}(2).