物理化学学报 >> 1994, Vol. 10 >> Issue (03): 217-222.doi: 10.3866/PKU.WHXB19940306

研究论文 上一篇    下一篇

N-甲基苯胺、二苯胺与质子受体相互作用的研究

王沂轩, 李宏平, 张富强, 赵健萍, 戴明   

  1. 河南化学研究所溶液研究室,郑州 450003
  • 收稿日期:1992-10-01 修回日期:1993-01-24 发布日期:1994-03-15
  • 通讯作者: 戴明

A Spectral Study of Intermolecular Hydrogen Bonding for N-methylaniline or Diphenylamine with some Proton Acceptors

Wang Yi-Xuan, Li Hong-Ping, Zhang Fu-Qiang, Zhao Jian-Ping, Dai Ming   

  1. Henan Institute of Chemistry, Zhengzhou 450003
  • Received:1992-10-01 Revised:1993-01-24 Published:1994-03-15
  • Contact: Dai Ming

摘要:

测量了N-甲基苯胺、二苯胺与一些极性非质子溶剂(B)在CCl_4中的红外光谱,观察到这两种劳胺均与所研究的质子受体发生了氢键交叉缔合作用,并利用光谱数据计算了相应缔合物的形成常数和部分氢键能.结果表明,二苯胺是比N-甲基苯胺更强的质子供体,非质子溶剂的极性、空间效应和不同成键原子对交叉缔合物的稳定性均有一定的影响.还从分子结构对有关结果进行了讨论.

关键词: 芳胺, 极性非质子溶剂, 红外光谱, 交叉缔合

Abstract:

Infared Spectra of (N-methylaniline or diphenylamine + one of aprotic sol vents+CCL_4) have been measured at 298.15 K. The results show that stretching frequen cies v_(NH) of the associated complex A—H…B depend on the proton-accepting abilities of B, and the frequency shifts show a nearly linear dependence on electron donor num ber (DN) and also on nucleophilicity parameter (B~o). Equilibrium constants of some AB cross-associated complexes have been estimated from IR data. The equilibrium constant values show that diphenylamine as a proton donor is stronger than N-methylaniline. Morever, the related conclusions have been briefly discussed in terms of molecular structure and interactions between unlike molecules.

Key words: N-methylaniline, Diphenylamine, Aprotic solvent, IR spectrum, Crossassociation