The enthalpies of formation of bis(dimethylamino)cyanophosphine, (dimethylamino)dicyanophosphine, and tricyanophosphine
作者:H Al-Maydama
DOI:10.1006/jcht.1995.0059
日期:1995.6
Abstract The standard molar enthalpies of formation at the temperature 298.15 K of (CH3)2N}2PCN(1), (CH3)2NP(CN)2(1), and P(CN)3(cr) have been determined by reaction calorimetry as −(0.4 ± 3.2) kJ·mol−1, (189.3 ± 5.0) kJ·mol−1, and (373.1 ± 6.8) kJ·mol−1, respectively. Enthalpies of vaporization have been obtained from vapour-pressure measurements for the first two compounds and the corresponding
摘要 (CH3)2N}2PCN(1)、(CH3)2NP(CN)2(1)和P(CN)3(cr)在298.15 K温度下的标准摩尔生成焓已通过反应确定量热法分别为 -(0.4 ± 3.2) kJ·mol-1、(189.3 ± 5.0) kJ·mol-1 和 (373.1 ± 6.8) kJ·mol-1。汽化焓是从前两种化合物的蒸气压测量中获得的,相应的 ΔfHm°(g)/(kJ·mol-1) 值推导为 (54.2 ± 3.5)、(228.7 ± 5.5) 和 ( 448.4 ± 7.4),分别。讨论了氰基膦中键焓D(P-CN)的值。