1. Abstracts of Papers presented at the 149th Meeting of the American Chemical Society;Tolberg,1965
2. Abstracts of Papers presented at the 149th Meeting of the American Chemical Society;Curtis,1965
3. Private communication. See also the note by Karl O. Criste, Jacques P. Guertin, and Attila E. Pavlath in this issue of Inorganic and Nuclear Chemistry Letters.