10026-07-0Relevant articles and documents
Tibbals, C. A.
, p. 902 - 913 (1909)
Solventless and mild procedure to prepare organotellurium(IV) compounds under microwave irradiation
Princival, Cleverson,Dos Santos, Alcindo A.,Comasseto, Jo?o V.
, p. 832 - 836 (2015)
Tellurium(IV) tetrachloride, p-methoxyphenyltellurium trichloride and the corresponding products of its reaction with alkynes were prepared under very mild reaction conditions, in absence of organic solvents and in short reaction times all assisted by mic
Synthesis and crystal structure of Te6[MCl6] (M = Zr, Hf), containing a polymeric chalcogen cation (Te62+) n
Baumann, Alexander,Beck, Johannes
, p. 2078 - 2082 (2004)
The reaction of tellurium, tellurium tetrachloride, and ZrCl4 or HfCl4, respectively, under the conditions of chemical vapour transport in a temperature gradient 220 → 200°C yields black crystals of Te6[ZrCl6] and Te6[HfCl6]. While Te6[ZrCl6] is formed almost quantitatively, Te 6[HfCl6] is always accompanied by neighbored phases such as Te4[HfCl6] and Te8[HfCl6]. The crystal structures of Te6[ZrCl6] (orthorhombic, Pbcm, a = 1095.4(1), b = 1085.2(1), c = 1324.5(1) pm) and Te6[HfCl6] (a = 1094.8(2), b = 1086.3(2), c = 1325.0(2) pm) are isotypic and consist of one-dimensional polymeric (Te62+)n cations and of discrete, only slightly distorted octahedral [MCl6]2- anions (M = Zr, Hf). The cations are build of five membered rings which are connected via single Te atoms to a polymer -Te-Te5-Te-Te 5-. Out of the six Te atoms of the asymmetric unit of the chain four atoms exhibit two bonds and two atoms exhibit three bonds. The connecting, threefold coordinated Te atoms of the five membered rings carry formally the positive charges. In consistence with the assumption of the presence of throughout localized bonds eH band structure calculations for Te 6[ZrCl6] show semiconducting behaviour with a band gap of 1.8 eV.
Study of the temperature effect on the process of rubidium hexachlorotellurite decomposition
Lyakh,Sizyakov,Zaitsev,Pigova,Ugolkov
, p. 1507 - 1509 (2010)
Thermal dissociation of rubidium hexachlorotellurite in inert atmosphere (argon) and in atmosphere with air access was studied. The DTG and DTA curves for the process of rubidium hexachlorotellurite thermal dissociation in the argon atmosphere are given. Their character is defined by the behavior of TeCl4, which is liberated on the decomposition of samples.
-
Fisher,Eisner
, p. 169,172 (1941)
-
Hutchins, E. B.
, p. 1157 - 1183 (1905)
Heavy atom analogues of 1,2,3-dithiazolylium salts: Preparation, structures and redox chemistry
Risto, Maarit,Assoud, Abdeljalil,Winter, Stephen M.,Oilunkaniemi, Raija,Laitinen, Risto S.,Oakley, Richard T.
, p. 10100 - 10109 (2009/05/15)
Synthetic routes to salts of the benzo[1,2,3]thiatellurazolylium cation [2c]+ and its selenium analogue [2b]+ are described. Access to the cation frameworks involves the intermediacy of N,N,S-trisilylated 2-aminobenzenethiol. The latter reacts smoothly with selenium and tellurium halides ECl4 (E = Se, Te) to afford the desired heterocyclic benzo cations [2b]+ and [2c]+ as their chloride salts. Anion exchange provides the corresponding GaCl4-, OTf - and TeCl5- salts of [2c]+, all of which have been characterized by X-ray crystallography. While the gallate salts of the sulfur and selenium cations [2a]+ and [2b]+ crystallize as ion-paired cations and anions, salts of [2c]+ adopt solid-state structures that display strong association of the cations via short intermolecular Te-N′ bonds. However, crystallization of [2c]+ salts in dichloroethane in the presence of GaCl3 leads to cleavage of the dimers and the formation of a Lewis acid adduct at nitrogen. Reduction of the benzo cations [2a,b]+ affords the respective radicals 2a,b, both of which have been characterized by electron paramagnetic resonance (EPR) spectroscopy. Attempts to generate the corresponding radical 2c have been unsuccessful, although a material of nominally correct elemental composition can be generated by chemical reduction. The energetics of association of [2a,b,c]+ in solution has been probed by means of density functional theory calculations using the polarized continuum model. The results suggest that the dimeric nature of the Te-centered cation is retained in solution. The strength of the interaction is, however, less than in N-alkylated tellurodiazolylium salts.
