1. S. Goldschmidt and K. Bachs, Chem. Ber.,88, 583 (1955).
2. S. Goldschmidt and L. Beer, Ann. Chem.,641, 40 (1961).
3. G. L. Nikishin, A. T. Koritskii, and E. K. Starostin, Izv. Akad. Nauk SSSR, Ser. Khim.,1970, 586.
4. L. J. Bellamy, Infrared Spectra of Complex Molecules [Russian translation], IL (1963).
5. A. T. Blomquist and I. A. Barstein, J. Am. Chem. Soc.,81, 5322 (1951).