About the Author ---------------- B D Gupta (Late) was professor, Department of chemistry, IIT Kanpur. After completing his Ph D from Flinders University, Australia, he worked as a post-doctoral researcher at the University College, London. After a one-year teaching stint at Roorkee University (now IIT Roorkee), he joined IIT Kanpur where he taught undergraduate, graduate and postgraduate students for over 30 years. He taught undergraduate classes for many years at various universities in the USA and Japan. He has published more than 90 research papers in international journals of repute in the area of organometallic chemistry of cobalt compounds. Anil J Elias is professor, Department of chemistry, IIT Delhi. After completing his Ph D in inorganic chemistry from IIT Madras, he gained further experience as an Alexander von Humboldt fellow in Germany and later at the Fluorine Research Laboratories of the University of Idaho, USA. He has been teaching undergraduate, graduate and postgraduate students at IIT Kanpur and IIT Delhi for over 20 years. His research interests are in the area of organometallic and main group chemistry. He has authored the book General Chemistry Experiments: An interesting Collection (Universities Press) and published more than 55 research papers in reputed international journals. Prof. Elias is the recipient of the INSA teacher s award instituted by the Indian National Science Academy for excellence in teaching science. Read more ( javascript:void(0) )