Kinetics and mechanism of pyrolysis of sulphonyl hydrazones and oximes. Part 1. Contribution to reactivity from hydrazone HNN and oxime ON bond polarity
作者:Nouria A Al-Awadi、Mohamed H Elnagdi、Kamini Kaul、Swaminathan Ilingovan、Osman M.E El-Dusouqui
DOI:10.1016/s0040-4020(98)00179-3
日期:1998.4
Rates were obtained for the pyrolysis of tosyl arenecarboxaldehyde hydrazones (1–5), and mesyl benzaldoxime (6). The substituted tosyl sulphonamides (TsHNN=CHAr: 1–5) and the mesylate (6) gave in a novel pyrolytic reaction the following Arrhenius log A/s−1 and Ea/kJ mol−1 values, respectively: 12.70 and 157.7 (1, ArC6H5), 12.29 and 152.6 (2, -NO2C6H4), 11.85 and 148.2 (3, -NO2C6H4), 12.17 and 152
获得了对甲苯磺酰基甲醛甲醛hydr(1-5)和甲磺酰基苯甲醛肟(6)的热解速率。在新颖的热解反应中,取代的甲苯磺酰胺(Ts HNN = CHAr:1-5)和甲磺酸酯(6)分别给出以下Arrhenius log A / s -1和E a / kJ mol -1值:12.70和157.7 (1,ArC 6 ħ 5),12.29和152.6(2,-NO 2 ç 6 ħ 4),11.85和148.2(3,-NO 2C 6 H 4),12.17和152.0(4,-ClC 6 H 4),11.01和140.8(5,-CH 3 OC 6 H 4),(6)为12.96和109.9 。还研究了甲苯磺酰基苯甲醛肟(7)。反应生成氰基芳烃以及6和7的磺酸,以及1-5的-甲基苯磺酰胺。