Enthalpies of combustion of 2,2′,4,4′,6,6′-hexamethylazobenzene-N,N-dioxide, 2,2′,6,6′-tetramethylazobenzene-N,N-dioxide, 2,4,6-trimethylnitrobenzene, and 2,6-dimethylnitrobenzene: the dissociation enthalpies of the N=N and N-O bonds
作者:W.E. Acree、Sheryl A. Tucker、G. Pilcher、Afza Chowdhary、Maria D.M.C.Ribeiro da Silva、M.J.S. Monte
DOI:10.1006/jcht.1993.1124
日期:1993.10
15 K of HMABOO and TMABOO were assessed from vapour-pressure measurements; the enthalpy of sublimation of NITME and the enthalpy of vaporization of NITXY were measured by microcalorimetry. The standard molar enthalpies of decomposition of the crystalline N,N -dioxides to the corresponding gaseous monomeric nitroso-compounds at T = 298.15 K were measured by microcalorimetry: for HMABOO, (181.1±2.5)
摘要 采用静态弹量热法测定了结晶 2,2',4,4',6,6'-六甲基偶氮苯-N,N-在温度 T = 298.15 K 下的标准 (po = 0.1 MPa) 摩尔燃烧焓。二氧化碳 (HHMABOO)、2,2',6,6'-四甲基偶氮苯-N,N-二氧化物 (TMABOO)、2,4,6-三甲基硝基苯 (NITME) 和液体 2,6-二甲基硝基苯 (NITXY)。HMABOO 和 TMABOO 在 298.15 K 温度下的升华焓是通过蒸气压测量来评估的;NITME的升华焓和NITXY的汽化焓通过微量热法测量。通过微量热法测量在 T = 298.15 K 时结晶 N,N -二氧化物分解为相应气态单体亚硝基化合物的标准摩尔焓:对于 HMABOO,(181.1±2.5) kJ·mol-1,对于 TMABOO, (179.2±2.2) kJ·mol-1。