Abstract
A solvent adduct study of 1,4,8,11-tetraazacyclotetradecane nickel(II) perchlorate with the coordinating solvents acetonitrile, N,N-dimethylformamide (DMF), methyl sulfoxide (DMSO), and water by optical and nmr techniques is reported. The thermodynamic parameters ΔH°, ΔS°, and K eq for adduct formation are given for each solvent system. At 25 °C, the stability order is found to be DMF > CH 3CN > DMSO > H 2O. A comparison of the observed stability order and stabilities predicted by single optical measurements and solvent donicity is presented.
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