1. Singhet al. Proc. Ind. Acad. Sci., 1956,43A, 21.
2. Frankland, P. F.J.C.S., 1896,69, 284.
3. Rule, H. G.,Ibid.,, 1924,125, 1122.
4. Cohen, J. B.Ibid., 1910,97, 1739; 1911,99, 1061.
5. Singh, B. K. and (Miss) Amma, M. K. P.Jour. Ind. Chem. Soc., 1954,31, 657.