Indian Journal of Chemistry Vol. ... V Sridharan, S Muthusubramanian* & S Sivasubramanian School of Chemistry, Madurai Kamaraj University, Madurai 625 021, India E-mail: muthumanian2001@ yahoo.com ... 4 Gowda DC, Mahesh B & Gowda S, Indian J Chem, 40B, 2001, 75. ...