N,N-二甲基甲酰胺/醇的过量红外振动波数与过量化学位移的研究

The Study of Excess IR Vibrational Wave Number and Excess Chemical Shift in N,N-Dimethylformamide/Alcohol

对N,N-二甲基甲酰胺(DMF)/醇体系进行了红外振动波数的研究,讨论了过量红外振动波数与摩尔浓度之间的关系,实验结果表明:1.在DMF/甲醇体系中,当X(甲醇)=0.59的时候,过量红外振动波数出现极值点;2.在DMF/乙醇体系中,当X(乙醇)=0.57的时候,过量红外振动波数出现极值点.另外,把出现极值点的位置与相同体系的过量化学位移进行了比较,发现二者基本吻合.通过这个方法可把二者联系在一起.

The research of the IR vibrational wave number of DMF and alcohol system is carried in this paper, the relation between the excess IR vibrational wave number and the mole concentration is discussed. The results show that： （1） when X（methanol） =0.59 in the DMF and methanol system, excess IR vibrational wave number appears extremum, （2） when X（ethanol）=0.57 in the DMF and ethanol system, excess IR vibrational wave number appears extremum. Compared the result with excess chemical shift in the same system, a good agreement is coincided and they can be related by this way.