Infrared study on solvent-solute interactions of 2-acetylthiophene in binary mixtures.
The infrared absorption spectra of the carbonyl stretching vibrations of 2-acetylthiophene (AcTh) have been investigated in cyclo-hexane/alcohol mixtures (C6(12/C2H5OH; (6H12/n-C4H9OH; C6H12/i-C3H7OH and C6H12/t-C5H11OH). Five types of carbonyl stretching vibration bands for AcTh are found with the change of the mole fraction of the aprotic solvent C6H12 (x(C6H12)) in binary solvent mixtures. The dependencies of the frequencies of carbonyl stretching vibrations (nu(C=O)) on x(C6H12) allow a distinction and assignment of all species resulting from the solvent-solute interactions. Linear correlations between the nu(C=O) of each species and x(C6H12) are found. The influence on the transformation of some species caused by the self association of alcohols is discussed.
Liu
Qing
Q
Department of Chemistry, Zhejiang University, Hangzhou 310027, People's Republic of China, liuqing@css.zju.edu.cn
Xu
Xiaomin
X
Fang
Danjun
D
Zheng
Jianping
J
D000438:Alcohols / Q000737:chemistry; D002244:Carbon / Q000737:chemistry*; D055598:Chemical Phenomena; D002621:Chemistry; D010100:Oxygen / Q000737:chemistry; D012996:Solutions; D012997:Solvents / Q000737:chemistry*; D013055:Spectrophotometry, Infrared / Q000379:methods*; D013844:Thiazoles / Q000737:chemistry*; D013876:Thiophenes / Q000737:chemistry; D014867:Water
D000438:Alcohols; D012996:Solutions; D012997:Solvents; D013844:Thiazoles; D013876:Thiophenes; D014867:Water; D002244:Carbon; D010100:Oxygen