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Journal of Zhejiang University SCIENCE A 2002 Vol.3 No.5 P.559~562

http://doi.org/10.1631/jzus.2002.0559


Solvent effects on infrared spectra of 2-Methyl-4,5-dimethoxy-3-oxo-2H-pyridizine: Part 2. Binary Solvent Systems


Author(s):  LIU Qing, SANG Wen-qiang, Xu Xiao-min

Affiliation(s):  Department of Chemistry, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   Lq2001@mail.hz.zj.cn

Key Words:  Infrared spectra, 2-methyl-4, 5-dimethoxy-3-oxo-2H-pyridizine, Binary solvent effects, Carbonyl stretching vibration


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LIU Qing, SANG Wen-qiang, Xu Xiao-min. Solvent effects on infrared spectra of 2-Methyl-4,5-dimethoxy-3-oxo-2H-pyridizine: Part 2. Binary Solvent Systems[J]. Journal of Zhejiang University Science A, 2002, 3(5): 559~562.

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%T Solvent effects on infrared spectra of 2-Methyl-4,5-dimethoxy-3-oxo-2H-pyridizine: Part 2. Binary Solvent Systems
%A LIU Qing
%A SANG Wen-qiang
%A Xu Xiao-min
%J Journal of Zhejiang University SCIENCE A
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%DOI 10.1631/jzus.2002.0559

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T1 - Solvent effects on infrared spectra of 2-Methyl-4,5-dimethoxy-3-oxo-2H-pyridizine: Part 2. Binary Solvent Systems
A1 - LIU Qing
A1 - SANG Wen-qiang
A1 - Xu Xiao-min
J0 - Journal of Zhejiang University Science A
VL - 3
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SP - 559
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DOI - 10.1631/jzus.2002.0559


Abstract: 
This research on the solvent effects of 2-methyl-4,5-dimethoxy-3-oxo-2H-pyridizine (MDOP) in binary solvent systems on the infrared spectra for MDOP in n-hexane/CHCl3 mixture solvents showed that there were three forms of carbonyl stretching vibration band [υ(C=O)] of MPOP as the mole fraction of CHCl3 in the binary solvents changes. In pure n-hexane solvent, the υ(C=O) of MDOP appeared at a relatively high wavenumber. With CHCl3 added, the υ(C=O) shifted to lower wavenumbers. Two new bands were observed over a certain range of mixture solvent compositions. The origin of the bands was discussed in the terms of two kinds of hydrogen bond together with their individual dependence on mixture composition. Comparisons were drawn for the solvent sensitivities of υ(C=O) for propanone.

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Reference

[1] Engberts, J.B.F.N., 1992. Carbonyl stretching frequency characteristics for the strongly hydrophobic solute, N-Cyclohexyl-2-pyrrolidinone in Binary Aqueous Mixtures at 298.15K. J. Chem. Soc. Faraday Trans. 88(17):2493-2495.

[2] Engberts, J.B.F.N., 1993. Solvent sensitivity of the wavenumber characterising the carbonyl stretching vibration of N-Cyclohexyl-2-pyrrolidinone dissolved in pure liquids and in mixtures formed by hexane and deuteriotrichloromethane at 298.2K. J. Chem. Soc. Faraday Trans. 89(23):4199-4202.

[3] Liu, Q., Sang, W.Q., Huang, D.H., 2002. Solvent effects on infrared spectra of 2- Methyl -4,5-dimethoxy-3-oxo-2H-pyridizine. Part 1. Single solvent systems. Journal of Zhejiang University SCIENCE, 3(3): 288-291.

[4] Perjessy, A., 1995. Infrared study of solvent-solute interaction of 1-substituted-2-pyrrolidinones and related compounds. Monatshefte Fur. Chemie., 126:871-888.

[5] Streck, Roman, 1999. Solvent effects on infrared 13C and 31P NMR spectra of trimethyl phosphate. Spectrochimica Acta Part A. 55:1059-1076.

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