Contributions to bis(perfluoroalkyl) chalkogenide chemistry: preparation of (Rf)2SeO [Rf = C2F5, (CF3)2CF, n-C4F9], (Rf′)2TeX2 [X = F, Cl: Rf′ = n-C3F7, (CF3)2CF, n-C4F9; X = Br: Rf′ = n-C3F7, n-C4F9], (CF3)2Te(NSO)2 and (C2F5)2Te(OH)NO3
摘要:
The reaction between perfluoroalkyl iodides with a threefold excess of a 1 : 1 molar mixture of Se and Cu is a new method for the preparation of corresponding monoselenides (la-c) and diselenides (2a-d). They are oxidised with HOF without a solvent to bis(perfluoroalkyl) selenium(IV) oxides (3a-d). Halogenation of (R-f)(2)Te with XeF2, Cl-2 or Br-2 yielded (R-f)(2)TeF2(7a-c), (R-f)(2)TeCl2 (8a-c) and (R-f')(2)TeBr2 (9a, 9c). Oxidation of (C2F5)(2)Te with cone. HNO3 gave (C2F5)(2)TeCOH)NO3 (4). When (CF3)(2)TeCl2 is treated with AgNSO metathesis took place forming (CF3)(2)Te(NSO)(2), (6). Two (C6F5)(2)Te(VI) derivatives with the general formula (C6F5)(2)TeX4. with X = CF3C(O)O (5) and F are made from (C6F5)(2)TeO2 and CF3C(O)OH or SP4, respectively. The monotelluride (n-C6F13)(2)Te was synthesised similarly from n-C6F13I, Te and Cu. X-ray structures for 3d, 8a, and 8b are provided. (C) 2000 Elsevier Science S.A. All rights reserved.
The preparation of tellurium perfluoroalkyls by photolysis of dimethyltelluride in the presence of perfluoroalkyl iodides
作者:Michael L. Denniston、Donald R. Martin
DOI:10.1016/0022-1902(75)80904-3
日期:1975.9
perfluoroalkyl-tellurium linkages have been synthesized: CH3TeCF3, (CF3)2Te, CH3TeC2F5, (C2F5)2Te. These preparations were brought about by the photochemical interaction of (CH3)2Te and an appropriate perfluoroalkyl iodide in a vycor tube at 310 nm wavelength. The resulting mixture of tellurides, RfTeCH3 and (Rf)2Te in which Rf = CF3 or C2F5, cannot be separated by trap-to-trap distillation, but the relative amounts
合成了以下含有全氟烷基-碲键的新化合物:CH 3 TeCF 3,(CF 3)2 Te,CH 3 TeC 2 F 5,(C 2 F 5)2 Te。这些制备是通过(CH 3)2 Te和合适的全氟烷基碘在vycor管中在310 nm波长下的光化学相互作用实现的。生成的碲化物R f TeCH 3和(R f)2 Te的混合物,其中R f= CF 3或C 2 F 5,不能通过捕集捕集蒸馏分离,但是每种产物的相对量通过19 F NMR光谱法确定。将澄清的黄色碲化物是空气稳定的,但是产率或者CF 3 H或C1 2 ˚F 5 H于碱性水解。直到80°C时,没有观察到CH 3 Cl发生反应,但是在215°C时,CH 3 TeCF 3和(CF 3)2 Te的混合物与苄基氯相互作用,生成3·4的C 6 H 5 CH 2 CF 3。分收益。
Reaction of tetratellurium(2+) bis(hexafluoroarsenate), Te4(AsF6)2, and hexatellurium(2+) bis(hexafluoroarsenate), Te6(AsF6)2, with tetrafluoroethylene. The preparation of bis(perfluoroethyl) mono- and di-telluride
作者:C. David Desjardins、Harvey L. Paige、Jack Passmore、Peter Taylor
DOI:10.1039/dt9750000488
日期:——
Solid Te4(AsF6)2 and Te6(AsF6)2 react with tetrafluoroethylene at 100 °C to give (C2F5)2Tex(x= 1 or 2) and C4F9TeC2F5. In sulphur dioxide solution Te4(AsF6)2 and tetrafluoroethylene yield C2F5TeC3F6C(O)F in addition to products found for the neat reactions. C2F5SeTeC2F5 and C2F5TeHgTeC2F5 have also been prepared. Compounds were identified by their mass spectra, and by 19F n.m.r. in the case of the
固态Te 4(AsF 6)2和Te 6(AsF 6)2在100°C下与四氟乙烯反应,得到(C 2 F 5)2 Te x(x = 1或2)和C 4 F 9 TeC 2 F 5。在二氧化硫溶液中,Te 4(AsF 6)2和四氟乙烯除了产生用于纯反应的产物外,还生成C 2 F 5 TeC 3 F 6 C(O)F。C 2还制备了F 5 SeTeC 2 F 5和C 2 F 5 TeHgTeC 2 F 5。通过质谱鉴定化合物,对于全氟烷基碲化物则通过19 F nmr鉴定。
The preparation of perfluoroethytellurium trifluoride, perfluoroethyltellurium monochloride tetrafluoride, bis(perfluoroethyl) tellurium difluoride, and bis(perfluoroethyl) tellurium tetrafluoride