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[摘要]：We describe the synthesis. characterization by IR and electronic spectra. magnetic susceptibility measurements. analytical data, kinetic study by differential-scanning calorimetry, and thermogravimetric analysis of the thermal decomposition under N-2 of the adducts 2-7 with pyridine or substituted pyridines of bis(piperidine-1-carbodithioata-kappa S,kappa S')di-mu-thioxodithioxoditungsten(V) (1), to which the general formula [W2B2(pipCS(2))(2)S-2(mu-S)(2)] is assigned (pipCS(2) = piperidine-1-carbodithioato and B=pyridine (py), 3-methylpyridine (3-Mepy), 4-methylpyridine (4-Mepy), 3,5-dimethylpyridine (3,5-Me(2)py), (py), 3-methylpyridine (3-Mepy), 4-methylpyridine (4-Mepy), 3,5-dimethylpyridine (3,5-Me(2)py), pyridin-3-amine (3-pyNH(2)). and pyridin-4-ainine (4-pyNH(2))). For the endothermic process of loss of the coordinated base B, we calculated activation energies with a method reported previously by us; the mechanism and pre-exponential Arrhenius factor of this reaction were also determined. A relationship between the pyridines' basicity, IR and electronic spectral data, and activation energies was established. |
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