分子内力
芳香性
分子
化学
有机分子
Crystal(编程语言)
化学物理
结晶学
熵(时间箭头)
固态
GSM演进的增强数据速率
立体化学
物理化学
热力学
有机化学
物理
计算机科学
电信
程序设计语言
作者
W.B. Jennings,Brid M. Farrell,John F. Malone
摘要
Recent X-ray crystallographic and NMR evidence indicates that relatively weak intramolecular edge-to-face interactions between aromatic rings can affect or determine the conformation of organic molecules in the solid state and in solution. Experimental estimates indicate that these interactions are energetically attractive by ca. 1.5 kcal mol(-1) but disfavored in solution by entropic factors due to the restricted internal mobility. Hence, these interactions are more manifest at low temperature in solution or in crystal structures where conformational entropy effects are negligible.
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