Fluorination of germanium concentrates with ammonium fluorides
摘要:
New method for processing of germanium-containing raw materials to obtain germanium oxide was suggested and studied. The method is based on the fluorination of germanium-containing raw materials with ammonium fluorides, followed by a sublimation isolation of ammonium hexafluoro-germanate, its dissolution, and precipitation of germanium oxide from solution. The thermodynamics of the process was calculated and its thermogravimetric analysis was made. The kinetics of germanium oxide fluorination by ammonium hydrodifluoride was experimentally studied. A technological scheme for processing of germanium-containing raw materials with ammonium fluoride was suggested.
New derivatives of tetrahydroborate(1–), BH<sub>3</sub>SiF<sub>3</sub><sup>–</sup>and BH<sub>2</sub>(SiF<sub>3</sub>)<sub>2</sub><sup>–</sup>
作者:Sydney Brownstein
DOI:10.1039/c39800000149
日期:——
Silicon tetrafluoride and tetrabutylammonium (TBA) tetrahydroborate react in methylene chloride solution to produce [TBA][BH3SiF3] and [TBA][BH2(SiF3)2].
The reactions of germylenes with pentafluorophenyl- and alkylpentafluorophenyl-digermanes give the trigermanes (C6F5)3 (XP=F,Cl;=F,Ph; R=F5,Et). Their thermal decomposition involves α-elimination to give halogermanes and germylgermylenes. These last bivalent species were trapped with dimethylbutadiene to give germylgermacyclopentenes. Insertion of phylphosphinidene into the very reactive germanium—germanium
germ亚甲基与五氟苯基-和烷基五氟苯基-二茂铁的反应得到三茂铁(C 6 F 5)3(XP = F,Cl; = F,Ph; R = F 5,Et)。它们的热分解涉及α-消除,从而得到卤代金缕梅和对甲基锗烷。这些最后的二价物质被二甲基丁二烯捕获,得到了胚芽基germacyclopentenes。还观察到了叶绿体亚基插入到反应性非常强的(C 6 F 5)3 GeGe(C 6 F 5)3的锗-锗键中。
Interactions des complexes du chrome ou du tungstene a ligande germylene avec des dipoles 1,3 (nitrones, oxaziridines)
Transition metal-germylene complexes of the type X2GeM(CO)5·TMF (M Cr, W; X F, Cl) react with nitrones by nucleophilic exchange at gernamium to form new stable adducts. The structure of such a compound was determined by single crystal X-ray diffraction, and its bonding is discussed in terms of the resulting structural parameters.
X 2 GeM(CO)5 ·TMF(M + Cr,W; X + F,Cl)类型的过渡金属-亚甲基配合物与锗烷通过在锗上的亲核交换反应形成新的稳定加合物。通过单晶X射线衍射确定这种化合物的结构,并根据所得的结构参数讨论其键合。
Reactive intermediates in organogermanium chemistry
作者:J. Satge
DOI:10.1351/pac198456010137
日期:1984.1.1
radicals) are also described. INSERTIONREACTIONS OF GERNYLENES INTO METAL—METAL BONDS Insertionreactions of divalent metal(1) species into metal—metal bonds provide and easy route to various polymetallated compounds •(Ref. 1) X2MIVb(M'Ln)2. Insertionreactions of germylenes into metal—metal bonds have been described in the literature (Ref. 1, 6 & 20). 137 Insertion into metallVb—bonds DifluorogermylenewhTEFflis
The preparation and structure of Ge<sub>3</sub>F<sub>8</sub>– a new mixed-valence fluoride of germanium, a convenient source of GeF<sub>2</sub>
作者:Andrew L. Hector、Andrew Jolleys、William Levason、David Pugh、Gillian Reid
DOI:10.1039/c4dt02265c
日期:——
The new binary mixed-valencefluoride of germanium, Ge3F8, has been obtained by heating GeF4 with powdered Ge in an autoclave (390 K/4 bar/48 h). The structure contains pyramidal GeIIF3 and octahedral GeIVF6 units, linked by fluoride bridges. The new compound is the missing member of the series (GeF2)n·GeF4 (n = 2, 4, or 6). Sublimation of (GeF2)n·GeF4in vacuo provides a convenient source of GeF2 in
通过在高压釜中(390 K / 4 bar / 48 h)将GeF 4和粉末状的Ge加热,可获得新的锗二元混合价氟化物Ge 3 F 8。该结构包含由氟化物桥连接的金字塔形Ge II F 3和八面体Ge IV F 6单元。新化合物是该系列(GeF 2)n ·GeF 4(n = 2、4或6)的缺失成员。的升华(GEF 2)ñ ·GEF 4在真空中提供GEF的方便来源2在约 总产率为30%。