1. Rao and SeshadriProc. Ind. Acad. Sci., A, 1941,14, 643.
2. Row and SeshadriIbid. 1945,21, 130.
3. Bargellini and BettoloGazetta, 1940,70, 170;Chem. Abs., 1940,34, 4736.
4. Slater and StephenJ. C. S., 1920, 316.
5. BakerIbid. J. C. S., 1939, 956; 1941, 662.