Abstract
The crystal structure of ( w -phthalato)bis[(N-(2-(diethylamino)ethyl)-salicylidenaminato)copper(II)-trihydrate,[Cu2(salNet2)2(w m phthal)] · 3H2O, where salNet2= N-(2-(diethylamino)ethyl)salicylidenaminate, has been determined by single-crystal X-ray analysis. It crystallizes in the monoclinic system, space group P21/c, with a = 19.9109(9), b = 10.0465(4), c = 18.5837(8)Å, and g = 100.625(1)°. In the molecular structure the two copper(II) ions are bridged by the phthalato ligand coordinated in an amphimonodentate mode and the local geometry around both copper(II) ions is square planar. Magnetic susceptibility data for the complex as a function of temperature show weak exchange interactions. The fitting of these data to the HDVV (Ĥ = -2J Ŝ 1 Ŝ2), S1 = S2 = 1/2 spin exchange model, yields a 2J value of -0.34 cm-1. An orbital interpretation of the observed weak antiferromagnetic interactions is presented based on the results of extended Hückel calculations on a model molecule.
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