浙江大学学报(英文版)
浙江大學學報(英文版)
절강대학학보(영문판)
JOURNAL OF ZHEJIANG UNIVERSITY SCIENCE
2002年
5期
559-562
,共4页
刘清%桑文强%徐小民
劉清%桑文彊%徐小民
류청%상문강%서소민
Infrared spectra,2-methyl-4,5-dimethoxy-3-oxo-2H-pyridizine,Binary solvent effects,Carbonyl stretching vibration
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.
