Preparation and magnetic properties of the copper(II) mixed carboxylates with haloacetate and ammonioacetate

Copper(II) mixed carboxylate compounds, CuX(X′CH2COO)(R3NCH2COO)·mH2O (X=C1, Br; X′=F, Cl; R=, CH3), were prepared, and then characterized by means of magnetic susceptibility and IR-spectroscopy. The mixed carboxylates with betaine have the copper(II) acetate-type dinuclear structures. The amount of spin-exchange coupling through betaine bridges was estimated.

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