[1] Madurai Kamaraj Univ, Sch Chem, Dept Organ Chem, Madurai 625021, Tamil Nadu, India
[2] Madurai Kamaraj Univ, Sch Chem, Dept Inorgan Chem, Madurai 625021, Tamil Nadu, India
[3] Texas A&M Univ, Dept Chem, Xray Diffract Lab, College Stn, TX 77842 USA