Synthesis,crystal structure and magnetic properties of a cyanide-bridged heterobimetallic trinuclear Cr_2~(III)Mn~(II) complex based on K[Cr(salen)(CN)2] building block

摘要

A new cyanide-containing building block K[Cr(salen)(CN)2] (H2salen = N,N'-bis(salicyl)ethylenediamine) with two trans cyanide groups has been exploited to assembly cyanide-bridged low-dimensional complexes.A cyanide-bridged heterobimetallic centrosymmetric trinuclear Cr~(III)-Mn~(II)-Cr~(III) complex [Cr(salen)(CN)2]2[Mn(phen)2] centre dot 2H2O (1) has been synthesized and its structure has been characterized by X-ray diffraction analysis.The magnetic coupling between Mn(II) and Cr(III) ions in the title complex was found to be anti-ferromagnetic with JMnCr = -2.02(2) cm~(-1) on the basis of the Hamiltonian H = -2J(S_(Mn)S_(Cr(1)) + S_(MnS_Cr(2)).