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用光谱法研究了Co[(C_2H_5O)_2PS_2]_3与吡啶的取代还原反应,测定了反应的平衡常数K=0.66±0.05(mol·dm~(-3))~(-3)。用X射线单晶衍射方法测定了Co[(C_2H_5O)_2PS_2]_2·2Py的晶体结构。晶体空间群为P2_(1/c),晶胞参数a=8.117(7),b=17.813(4),c=9.901(3)A;β=104.19(5)°; Z=2;晶体密度计算值D_o=1.406g·cm~(-3)。差热分析印证了标题化合物含二分子吡啶。提出了可能的取代还原反应的机理。
The substituted reduction reaction of Co [(C_2H_5O) _2PS_2] _3 with pyridine was studied spectrophotometrically. The equilibrium constant of the reaction was determined as K = 0.66 ± 0.05 (mol · dm -3) -3. The crystal structure of Co [(C_2H_5O) _2PS_2] _2 · 2Py was determined by X-ray single crystal diffraction. The crystal space group P2_ (1 / c), cell parameters a = 8.117 (7), b = 17.813 (4), c = 9.901 (3) A; β = 104.19 (5) °; Calculated value D_o = 1.406g · cm -3. Differential thermal analysis confirms that the title compound contains two molecules of pyridine. Proposed a possible mechanism to replace the reduction reaction.