Acta Phys. -Chim. Sin. ›› 1991, Vol. 7 ›› Issue (01): 49-56.doi: 10.3866/PKU.WHXB19910108

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Excess Volumes for (Tetrachlorloromethane+Lewis Bases) and for (Trichloromethane+Lewis Bases)

Gong Hua; Jiang Yong-Ji; Wang Yi; Chen Ming-Zhi; Zheng Guo-Kang   

  1. Department of Chemistry, Lanzhou University, Lanzhou
  • Received:1989-09-23 Revised:1990-04-05 Published:1991-02-15
  • Contact: Gong Hua

Abstract: Excess volumes have been measured by means of a continuous dilution dilatometer or a vibrational tube densimeter for both tetrachloromethane and trichloromethane+N,N-dimethylformamide (DMF), +N,N-dimethylacetamide (DMA), +N-methylpyrrolidone(NMP), +γ-butyroIactone(γ-BL) , +dimethysulfoxide(DMSO), at 298.15 K V~E values are negative over the entire range of composition for all systems except (trichloromethane + dimethylsulfoxide) which exhibits a sigmoid curve with negative values in the trichloromethane rich region. |V_(min)~E| values of the two series decrease in the order NMP>γ-BL>DMF≈DMA?DMSO. The results are interpreted in terms of forming charge-transfer complexes between tetrachloromethane and Lewis bases, and forming hydrogen-bonding associations between trichloromethane and Lewis bases respectively.

Key words: Lewis bases, Tetrachloromethane, Trichloromethane, Excess volumes, Continuous dilution dilatometer