Conformations, equilibrium thermodynamics and rotational barriers of secondary thiobenzanilides
作者:Ján Kozic、Zdeněk Novák、Václav Římal、Václav Profant、Jiří Kuneš、Jarmila Vinšová
DOI:10.1016/j.tet.2016.02.035
日期:2016.4
deals with conformational behaviour of 2-methoxy-2′-hydroxythiobenzanilides. The CS-NH group of these compounds preferentially adopts the Z-conformation. Entropy favours the Z-conformer over the E-conformer, whereas enthalpy slightly favours the E-conformer over the Z-conformer. The rotational barrier about the CS-NH bond was determined to be (81.5±0.4) kJ/mol. No significant rotational barrier was found
该文章涉及2-甲氧基-2'-羟基硫代苯并甲腈的构象行为。这些化合物的CS-NH基团优先采用Z-构象。熵有利于ž在-conformer ê -conformer,而焓略微有利于Ë在-conformer ž -conformer。确定关于CS-NH键的旋转势垒为(81.5±0.4)kJ / mol。在Ar–CS和Ar–NH键上未发现明显的旋转势垒。将所有实验结果与量子化学计算结果进行比较。