Ferromagnetic coupling and thermochromism in [Ni(rac-CTH)(mu(1,1)-N-3)(2)Cu(N-3)(2)], the first end-on azido-bridged bimetallic complex

摘要

Reaction of [Ni(rac-CTH)(ClO4)(2)](rac-CTH=rac-5,7,7, 12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane) with NaN3 and Cu(NO3)(2).3H(2)O produces the binuclear complex [Ni(rac-CTH)(mu(1,1)-N-3)(2)Cu(N-3)(2)] 1, which represents the first example of an end-on bridged bimetallic complex; 1 exhibits intramolecular ferromagnetic exchange coupling and thermochromism, this latter being a consequence of the intermolecular interaction at low temperature.