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Citation: ng Hua, Jiang Yong-Ji, Wang Yi, Chen Ming-Zhi, Zheng Guo-Kang. Excess Volumes for (Tetrachlorloromethane+Lewis Bases) and for (Trichloromethane+Lewis Bases)[J]. Acta Physico-Chimica Sinica, ;1991, 7(01): 49-56. doi: 10.3866/PKU.WHXB19910108 shu

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

1.
Department of Chemistry, Lanzhou University, Lanzhou

Received Date: 23 September 1989
Available Online: 15 February 1991

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.
- Lewis bases; Tetrachloromethane; Trichloromethane; Excess volumes; Continuous dilution dilatometer
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