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Effect of Solvents on the Spectra of Some N ′‐2‐(Substituted Pyridyl)‐ N ‐Substituted‐Thioureas
Author(s) -
Khurana O. P.,
Tyagi J. S.,
Taneja A. D.
Publication year - 1982
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.198200031
Subject(s) - chemistry , substituent , thiourea , benzene , solvent , solvent polarity , polarity (international relations) , solvent effects , ethylene glycol , spectral line , photochemistry , medicinal chemistry , crystallography , organic chemistry , biochemistry , physics , astronomy , cell
Some N ′‐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 ( E T ) 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 μ→μ* and thiocarbonyl μ→μ* transitions. The effect of substituent present in pyridyl group on λ max of a compound in the same solvent has been studied. Solvent sensitivites of these ligands have also been calculated.