Journal of the American Chemical Society, , vol. 58, p. 586 Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, , vol. 202, p. 1339 Scientific Papers of the Institute of Physical and Chemical Research (Japan), , vol. 33, p. 13,64 Chem. Zentralbl., , vol. 109, # I p. 1682