四苯硼钠在直链一元醇中的溶解度及其从水到醇中的迁移自由能

在288.15-328.15K, 用分光光度法测定了四苯硼钠在7种直链一元醇中的溶解度。计算并讨论了298.15K时, 四苯硼钠从水到醇中的标准迁移自由能及介质效应的大小。通过计算机曲线拟合, 给出了四苯硼钠的溶解度跟直链一元醇碳原子数及温度的关系,同时给出了298.15K时, 四苯硼钠的标准迁移自由能跟直链一元醇的介电常数和碳原子数的关系。

Solubility of sodium tetraphenylborate in straight chains monohydric alcohols and its free energies of transfer from water to alcohols

Solubilities (c) of sodium tetraphenylborate in methanol, ethanol, 1-propanol, 1-butanol, 1-pentanol, 1-hexanol, 1-octanol at 288.15, 298.15, 308.15, 328.15 K were determine by the spectrophotometry. The data can be expressed by lg c = 0.9090 + (-0.4545 + 0.1520 lg T) (10 + n), where n is the no. of carbon atoms in the straight-chain monohydric alcs. The standard free energies of transfer (DG0) of sodium tetraphenylborate from water to the straight chains monohydric alcs. at 298.15 K were calculated The results can be expressed as DG0 = 55.75 exp(-0.0881 D), where D is the dielec. constant of the alcohol When DGt0 is plotted against n, a straight line is obtained. The results can be expressed as DGt0 = -4.92 ?10-3 + 3.08 n.