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V K Kelkar
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Volume 88 Issue 3 June 1979 pp 155-162 Physical and Theoretical
Spectral properties of some amino substituted p-benzoquinones
M S Ramachandran U Chandra Singh N R Subbaratnam V K Kelkar
Electronic spectra of amino substituted
p -benzoquinones (PBQ) have been recorded and the bands assigned on the basis of PPP-CI calculations. The results show that the aminoquinones have two allowedπ -π* transitions around 3.70 eV and 5.65 eV. Then -π* transition of tetra-aminop -benzoquinone is found to be almost ten times more intense than that of diaminop -benzoquinones. A comparison of methoxy and aminop -benzoquinones gives strong evidence for the quinonoid character for the latter rather than a quadrupolar merocyanine structure. An examination of the infrared spectra suggests the existence of intra-molecular hydrogen bonding in aminoquinones. -
Volume 88 Issue 4 August 1979 pp 333-333 Erratum
Proceedings of the Indian Academy of Sciences—Section A—Volume 88–1979
V C Jyothi Bhasu D N Sathyanarayana C C Patel R Namasivayam S Nagarajan K Subramanyam Reddy P R Naidu P N Nandi Reddy D A Deshpande V G Kher T Manimaran M Natarajam V T Ramakrishnan N S Navaneetham S Soundararajan Wahid U Malik R N Goyal Sudha Tyagi Gobinda Basu B D Mali L D Pethe M S Ramachandran U Chandra Singh N R Subbaratnam V K Kelkar P S Radhakrishnamurti B R K Swamy B R K Swamy S P Gupta P Singh K V Sane R P Saxena P K Srivastava Balawant S Joshi Vinod R Hegde
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Journal of Chemical Sciences
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