4ˉ羟甲基吡啶二聚体和三聚体氢键结构性质的理论研究
, PP. 110-113
Keywords: 4ˉ羟甲基吡啶,二聚体,三聚体,氢键,密度泛函理论
Abstract:
运用密度泛函理论B3LYP方法和6ˉ311++Gˇˇ基函数研究了4ˉ羟甲基吡啶二聚体和三聚体氢键结构性质.构型优化和频率计算分别得到4个和2个稳定的二聚体和三聚体氢键异构体.经基组重叠误差和零点振动能校正后,最稳定的二聚体和三聚体的相互作用能分别为-29.017和-61.142kJ/mol.振动分析表明二聚体和三聚体存在典型的红移型氢键.热力学分析显示,298.15K和标准压力下,二聚体和三聚体的形成是一个熵减小的非自发放热过程.
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