Molecular Structure and Magnetic Properties of the Binuclear Phthalato-Bridged Species Bis[(N-(2-(Diethylamino)Ethyl)Salicylidenaminato)-Copper(II)] Trihydrate

Author： Xanthopoulos C.E. Hadjikostas C.C. Katsoulos G.A. Terzis A. Sigalas M.P.

Publisher： Taylor & Francis Ltd

ISSN： 0095-8972

Source： Journal of Coordination Chemistry, Vol.55, Iss.5, 2002-01, pp. : 563-572

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

Abstract

The crystal structure of (μ-phthalato)bis[(N-(2-(diethylamino)ethyl)-salicylidenaminato)copper(II)-trihydrate, [Cu₂ (salNet₂ )₂ (μ − 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 β = 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 Ŝ₁ 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.