Experimental standard molar enthalpies of formation of crystalline 3,5-dimethylpyrazole, 3,5-dimethyl-4-nitrosopyrazole, 1,3,5-trimethyl-4-nitrosopyrazole, and 3,5-dimethyl-1-phenyl-4-nitrosopyrazole
作者:Maria D.M.C. Ribeiro da Silva、Susana C.C. Ferreira、Ivone A.P. Rodrigues、Luís C.M. da Silva、William E. Acree Jr、Siddharth Pandey、Lindsay E. Roy
DOI:10.1006/jcht.2000.0768
日期:2001.10
The standard (po = 0.1 MPa) molar enthalpies of combustion in oxygen, at T = 298.15 K, for crystalline 3,5-dimethylpyrazole (Me2Pyr), 3,5-dimethyl-4-nitrosopyrazole (Me2PyrNO), 1,3,5-trimethyl-4-nitrosopyrazole (Me3PyrNO), and 3,5-dimethyl-1-phenyl-4-nitrosopyrazole (Me2PhPyrNO) were measured by static-bomb calorimetry. These values were used to derive the standard molar enthalpies of formation of the
摘要 晶体 3,5-二甲基吡唑 (Me2Pyr)、3,5-二甲基-4-亚硝基吡唑 (Me2PyrNO)、1,3、 5-三甲基-4-亚硝基吡唑 (Me3PyrNO) 和 3,5-二甲基-1-苯基-4-亚硝基吡唑 (Me2PhPyrNO) 通过静态弹量热法进行测量。这些值用于推导出结晶化合物形成的标准摩尔焓。这四种化合物的标准摩尔升华焓是通过微量热法测量的。获得的实验结果使我们能够推导出本工作中涉及的单体化合物在气态下的标准摩尔生成焓值。这些最后的值与先前获得的一些芳族亚硝基衍生物的结果进行了比较讨论。