The reaction of perfluoroaryllithium RC 6 F 4 Li, where R = F trimethylsilyl reagents Me 3 SiX (X = Br, CN, NMe 2 , NEt 2 ) to form 5a, 5b; selenocyanates RC 6 F 4 SeCN (6a, 6b); selenenyl or 4-CF 3 C 6 F 4 O, respectively, with selenium gives the known diselanes (RC 6 F 4 Se) 2 (1a, 1b). Redox reactions of 1 with amides RC 6 F 4 SeNMe 2 (7a, 7b) and RC 6 F 4 SeNEt 2 (8a, 8b). A new synthetic route to diorgano selanes is developed by hydrogen peroxide result in the formation of the seleninic acids RC 6 F 4 SeOOH which crystallize as hydrates (2a, 2b); reaction of 4a, 4b with perfluoroaryllithium to give the symmetric (RC 6 F 4 ) 2 Se (9a, 9b). All derivatives are thoroughly with mercury give the bis(arylseleno)mercuries (RC 6 F 4 Se) 2 Hg (3a, 3b); with sulfuryl chloride or bromine give
characterized and in addition the molecular structures of 2a, 6a, and 9a are established by X-ray crystallography. the selenenyl chlorides (4a, 4b) or selenenyl bromides (5a, 5b). Selenenyl chlorides (4a, 4b) react with a variety of ated temperatures. [2] For those materials simplified routes [ ] X-ray structure analysis. [a] Institut für Anorganische Chemie der Universität München further chemistry at the selenium center.