Document Details Document Type : Article In Journal  Document Title : Electronic absorption spectra of some 2-thiouracil derivatives Electronic absorption spectra of some 2-thiouracil derivatives   Document Language : Arabic  Abstract : The electronic absorption spectra of 2-thiouracil and some of its derivatives were investigated using polar and nonpolar solvents. The present analysis is facilitated via computer deconvolution of the observed spectra and molecular orbital (MO) computations. Comparison between the experimentally observed and theoretically computed spectra in addition to a quantitative assignment of all transitions observed were undertaken. The computed dipole moments are used to indicate the polarity of the excited state and hence predict its solvent dependence. Vie spectra are, in general, very well predicted and assigned using INDO/S computational results. The spectrum of the trifluoro derivative is much more complicated and the corresponding states show much more solvent dependence than those observed for other thiouracil studied.  Journal Name : PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS  Volume : 180  Issue Number : 2  Publishing Year : 2005 AH   Added Date : Friday, June 20, 2008  Researchers Researcher Name (Arabic) Researcher Name (English) Researcher Type Dr Grade Email . Moustafa H Researcher     . Shibl MF Researcher     . Hilal R Researcher     Back To Researches Page