942626-67-7Relevant articles and documents
Perfluoroalkyl(dithiocarbamato) tellurium(ii) compounds
Tyrra, Wieland,Naumann, Dieter,Buslei, Sigrid,Kremer, Silke,Pantenburg, Ingo,Scherer, Harald
, p. 1829 - 1837 (2008/02/09)
[NMe4][RfTe(SC(S)NR2)2] derivatives are selectively formed by the oxidation of [NMe4]TeR f (Rf = CF3, C2F5) with [R2NC(S)S]2 (NR2 = NEt2, NBz 2, N(CH2)4) in almost quantitative yields. An alternative route to obtain the dithiocarbamato complex anions offer reactions of Te[SC(S)NR2]2 (NR2 = NEt2, NBz2) with equimolar amounts of Me3SiRf and [NMe4]F. Some of the derivatives were recrystallized with bulky cations in order to determine the crystal structures. Structural elucidation by diffraction methods exhibit the structural feature of a distorted pentagonal planar environment (resembling "butterflies") around the tellurium centres. The carbamato tellurates can be transferred easily into the neutral derivatives, RfTeSC(S)NR2, upon treatment with Ag[BF 4]. In solution they equilibrate with Te2(R f)2 and [R2NC(S)S]2 and finally are transformed into Te(Rf)2, Te[SC(S)NR2] 2, and Te[SC(S)NR2]4, respectively. All compounds are fully characterized by NMR spectroscopic methods (1H, 13C, 19F, 125Te). Additionally, synthesis and characterization of the hitherto unknown derivative [NMe4]TeC 2F5 are described. The Royal Society of Chemistry.
