- 作者: O. P. Khurana; J. S. Tyagi; A. D. Tancja
- 中文摘要: Some N1-2-(substituted pyridyl)-N-substituted thiourea (in all 12-substituted pyridyl thioureas) have been examined in ultraviolet region in a series of solvents covering a broad polarity range i.e. from benzene (Z, 54.0) to ethylene glycol (Z, 85.1). Transition energies and oscillator strengths have been calculated and transition energy (Er) has been plotted against Z-values, a new-empirical measurement of solvent polarity. A linear relationship was observed between the transition energy and Z-value for pyridyl π→π* and thiocarbonylπ→π* transitions. The effect of substituent present in pyridyl group on λmax of a compound in the same solvent has been studied. Solvent sensitivities of these ligands have also been calculated.
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