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Citation: Wang Jin-Ben, Wang Yi-Xuan, Zhang Fu-Qiang, Zhao Jian-Ping, Dai Ming. A Study on Association of Amine With Several Solutes by Infrared Spectrometry[J]. Acta Physico-Chimica Sinica, ;1992, 8(04): 481-486. doi: 10.3866/PKU.WHXB19920411 shu

A Study on Association of Amine With Several Solutes by Infrared Spectrometry

1.
Research Laboratory of Solutin Chemistry, Henan Institute of Chemistry, Zhengzhou 450003

Received Date: 25 March 1991
Available Online: 15 August 1992

Infrared spectra of binary mixtures of aniline or N-methylaniline with n-heptane, carbon tetrachloride, benzene or toluene have been measured at room temperatures with an IR spectrometer. The solvent effect on the NH group stretching vibration frequencies were discussed. Infrared spectra of several mixtures containing a nitro-genous Lewis base in CCl_4. were also determined and the involved cross-association contants were calculated. The results indicate that aniline is a stronger proton donor than N-methylaniline when they associate with pyridine in CCl_4, and the protonaccepting ability of several bases increase in the order: aniline ～N-methylaniline<tributylamine<pyridine<triethylamine when they associate with ethanol in CCl_4. Moreover, infrared spectra of ternary mixtures (ethanol+pyridine+chloroform) were briefly analysed in terms of the interactions between unlike molecules.
- Infrared spectrum; Solvent effect; Hydrogen bonding; Association equilibrium constant
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