摘要
在298.15K下用连续稀释膨胀计或振动管密度计测量了二甲基甲酰胺(DMF)、二甲基乙酰胺(DMA)、N-甲基吡咯烷酮(NMP)、γ-丁内酯(γ-BL)、二甲基亚砜(DMSO)分别与四氯化碳和三氯甲烷构成的二元系的过量体积。除DMSO+CHCl_2二元系的V^(E-x)曲线为S形外,其余二元系的V^E值均为负值。在所研究的两个系列中,|V_(min_~E|的大小顺序均为: NMP>γ-BL>DMF≈DMA>
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 298.15K 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.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1991年第1期49-56,共8页
Acta Physico-Chimica Sinica
基金
国家自然科学基金
关键词
LEWIS碱
CCL4
CHCl3
过量体积
DMF
Lewis bases, Tetrachloromethane, Trichloromethane, Excess volumes, Continuous dilution dilatometer
