Abstract
Four enol-form binuclear copper complexes with different exogenous bridges, [Cu 2 (L)(μ-Cl)] (1), [Cu(L)(μ-N 3 )]· DMF (2), [Cu 2 (L)(μ-OCH 3 )] (3) and [Cu 2 (L)(μ-C 3 H 3 N 2 )]· 1/2C 2 H 5 OH (4), where L is the trivalence anion of binucleating ligand 2,6-diformyl-4-methylphenol di(tenzoylhydrazone), have been synthesized and characterized. Crystal data for complex (3) are as follows: space group P 1 - , a =0.8294(1), b =0.9333(3), c = 1.473 6(6) nm, α =79.51(3)°, β =80.93(2)°, γ =81.32(2)°, Z =1. The magnetic measurements indicated that the effect of exogenous bridging ligands on magnetic interaction is corresponding to that in spectrochemical series. The effect of enol- and keto-form tautomer on magnetic interaction was explained from the point of view of structural factors and electron effects by using molecular mechanks and quantum chemistry calculations.
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