Prepn: Slotta, Jacobi, J. Prakt. Chem. [2] 120, 249 (1929); R. C. Larock, H. C. Brown, J. Am. Chem. Soc. 92, 2467 (1970). Distribution in mice: M. Yonaha et al., Chem. Pharm. Bull. 23, 1718 (1975). For the prepn of the bromide see Slotta, Jacobi, loc. cit.; Marvel et al., J. Am. Chem. Soc. 47, 3009 (1925). Review and bibliography: Krause, von Grosse, Die Chemie der Metallorganischen Verbindungen (Berlin, 1937).