title: Perfluoroalkyl(dithiocarbamato) tellurium(II) compounds.
abstract: [NMe(4)][R(f)Te(SC(S)NR(2))(2)] derivatives are selectively formed by the oxidation of [NMe(4)]TeR(f) (R(f) = CF(3), C(2)F(5)) with [R(2)NC(S)S](2) (NR(2) = NEt(2), NBz(2), N(CH(2))(4)) in almost quantitative yields. An alternative route to obtain the dithiocarbamato complex anions offer reactions of Te[SC(S)NR(2)](2) (NR(2) = NEt(2), NBz(2)) with equimolar amounts of Me(3)SiR(f) and [NMe(4)]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, R(f)TeSC(S)NR(2), upon treatment with Ag[BF(4)]. In solution they equilibrate with Te(2)(R(f))(2) and [R(2)NC(S)S](2) and finally are transformed into Te(R(f))(2), Te[SC(S)NR(2)](2), and Te[SC(S)NR(2)](4), respectively. All compounds are fully characterized by NMR spectroscopic methods ((1)H, (13)C, (19)F, (125)Te). Additionally, synthesis and characterization of the hitherto unknown derivative [NMe(4)]TeC(2)F(5) are described.
authors.affiliation: Institut für Anorganische Chemie, Universität zu Köln, Köln, Germany. tyrra@uni-koeln.de d.naumann@uni-koeln.de
authors.forename: Wieland
authors.initials: W
authors.lastname: Tyrra
authors.forename: Dieter
authors.initials: D
authors.lastname: Naumann
authors.forename: Sigrid
authors.initials: S
authors.lastname: Buslei
authors.forename: Silke
authors.initials: S
authors.lastname: Kremer
authors.forename: Ingo
authors.initials: I
authors.lastname: Pantenburg
authors.forename: Harald
authors.initials: H
authors.lastname: Scherer