1Department of Chemistry, S. K. Porwal College, Kamptee, Dist. Nagpur 4410 01, India
2Department of Chemistry, R. T. M. Nagpur University, Nagpur 4400 33, India
3Department of Chemistry, Hislop College, Nagpur 440 001, India
4G. H. Raisoni Academy of Engineering and Technology, Nagpur 440 028, India
5Department of Biochemistry, L.A.D. and Smt. R. P. College, Nagpur 440 010, India