20334-43-4Relevant articles and documents
Synthesis of Multivalent Organotellurium Chain-Transfer Agents by Post-modification and Their Applications in Living Radical Polymerization
Fan, Weijia,Nakamura, Yasuyuki,Yamago, Shigeru
, p. 17006 - 17010 (2016)
Functionalized or multivalent organotellurium chain-transfer agents (CTAs) for living radical polymerization were synthesized by post-modification, which involved the condensation between a carboxylic-acid-functionalized CTA and various amines in excellent yields without affecting the reactive tellurium moiety. The CTAs exhibited high synthetic versatility for radical polymerization and gave structurally well-controlled polymers, such as multiarmed polymers, from various monomers. Because all new CTAs are easily available on a large scale by simple purification, the current method significantly facilitates macromolecular engineering based on organotellurium-mediated radical polymerization (TERP).
Homolytic reactions of diorganotellurium and diorganoditellurium compounds in solution; an EPR study
Bell, William,Cole-Hamilton, David J.,Culshaw, Peter N.,McQueen, A. Ewan D.,Shenai-Khatkhate, D. V.,et al.
, p. 43 - 52 (1992)
The thermal and photochemical decompositions of dialkyltelluriums and dialkylditelluriums in t-butylbenzene solvent have been studied by EPR spectroscopy.On photolysis, di-t-butyl, diallyl, allyl methyl, and dibenzyl tellurium showed EPR spectra of t-butyl, allyl, allyl, and benzyl radicals respectively.Alkyl radicals were not detected directly on thermolysis in the range 300-370 K but, primary, secondary, and tertiary alkyl, benzyl and allyl telluriums gave spin adducts of the corresponding alkyl radical with nitrosodurene.Dimethyl tellurium was unreactive in the same temperature range.The rates of thermal decomposition of the diorgano telluriums at 315 K were found to be in the following order, as judged by the intensity of the spin adduct spectra: tBu2Te ca. tBuTeMe > (allyl)2Te ca. allylTeMe > sBu2Te > (benzyl)2Te > iPr2Te > Et2Te > Me2Te.For dihex-5-ethyltellurium the results were consistent with formation and cyclisation of hex-5-enyl and hex-5-enetelluryl radicals.In the case of dipent-4-enyltellurium, the results suggested that both exo- and endo-cyclisation of the pentene telluryl radicals were important.Di-isopropyl- and di-t-butyl-ditelluriums gave spin adducts of the corresponding alkyl radicals on therolysis in the same temperature range as the monoalkyltelluriums.
Synthesis of 1,2-ditellurane
Singh, Harkesh B.,Khanna, Pawan K.
, p. 9 - 12 (1988)
Freshly prepared solutions of disodium ditelluride react with diiodobutane to give small yields of 1,2-ditellurane.In contrast, reactions of α,α-bis(chloromethyl)-o-xylene and phthaloyl chloride give 3,4-benzo-1-telluracyclopentane and tellurophthalic anhydride respectively.
Anion Recognition in Water by Charge-Neutral Halogen and Chalcogen Bonding Foldamer Receptors
Borissov, Arseni,Marques, Igor,Lim, Jason Y.C.,Félix, Vítor,Smith, Martin D.,Beer, Paul D.
, p. 4119 - 4129 (2019)
A novel strategy for the recognition of anions in water using charge-neutral σ-hole halogen and chalcogen bonding acyclic hosts is demonstrated for the first time. Exploiting the intrinsic hydrophobicity of halogen and chalcogen bond donor atoms integrated into a foldamer structural molecular framework containing hydrophilic functionalities, a series of water-soluble receptors was constructed for an anion recognition investigation. Isothermal titration calorimetry (ITC) binding studies with a range of anions revealed the receptors to display very strong and selective binding of large, weakly hydrated anions such as I- and ReO4-. This is achieved through the formation of 2:1 host-guest stoichiometric complex assemblies, resulting in an encapsulated anion stabilized by cooperative, multidentate, convergent σ-hole donors, as shown by molecular dynamics simulations carried out in water. Importantly, the combination of multiple σ-hole-anion interactions and hydrophobic collapse results in I- affinities in water that exceed all known σ-hole receptors, including cationic systems (β2 up to 1.68 × 1011 M-2). Furthermore, the anion binding affinities and selectivity trends of the first example of an all-chalcogen bonding anion receptor in pure water are compared with halogen bonding and hydrogen bonding receptor analogues. These results further advance and establish halogen and chalcogen bond donor functions as new tools for overcoming the challenging goal of anion recognition in pure water.
THE PREPARATION OF DI-t-BUTYL DITELLURIDE AND DI-t-BUTYL TELLURIDE AND THE 125Te NMR AND MOESSBAUER SPECTRA OF SOME DIALKYL TELLURIDES AND DITELLURIDES
Jones, C.H.W.,Sharma, R.D.
, p. 61 - 70 (1983)
The synthesis of di-t-butyl ditelluride, t-Bu2Te2, an di-t-butyl telluride, t-Bu2Te, are reported together with that of di-(neo-hexyl) ditelluride.New syntheses of Me2Te2 and i-Pr2Te2 are presented.The high resolution 125Te NMR data and the Moessbauer data for these compounds are discussed.The use of tellurium-proton couplings in high resolution 125Te NMR spectra in assigning the resonances in mixed dialkyl ditellurides is also illustrated.
Polyynes to Polycycles: Domino Reactions Forming Polyfused Chalcogenophenes
Dillon, Annaliese S.,Flynn, Bernard L.
supporting information, p. 2987 - 2990 (2020/04/09)
Polyfused chalcogenophenes are prepared in one step through polyelectrophilic cyclization of polyynes using the ambiphilic reagent MeACl (A = S, Se, or Te). Up to four new rings have been generated under mild conditions, including thiophenes, selenophenes, and tellurophenes.
RADICAL POLYMERIZATION INITIATOR AND METHOD FOR PRODUCING POLYMERS
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Paragraph 0139-0142, (2016/10/31)
The present invention involves a radical polymerization initiator comprising an organotellurium compound represented by a formula (1), wherein R1 represents an alkyl group or the like, each of R2 and R3 independently represents a hydrogen atom or the like, and each of R4, R5, and R6 independently represents a hydrogen atom or the like. The present invention provides: a radical polymerization initiator that is useful for producing a polymer that includes a double bond at the molecular terminal; and a method for producing a polymer that utilizes the radical polymerization initiator.
Reaction of 1,1-dichloroethane with tellurium in the system hydrazine hydrate-potassium hydroxide
Levanova,Grabel'nykh,Kolesnikov,Klyba,Zhanchipova,Albanov,Russavskaya,Korchevin
experimental part, p. 988 - 992 (2011/02/26)
The reaction of 1,1-dichloroethane with tellurium in the system hydrazine hydrate-potassium hydroxide gave ethyltellanyl derivatives as a result of replacement of one chlorine atom in the substrate by tellurium, and of the other, by hydrogen. Probable mechanisms of reduction of the C-Cl bond and mass spectra of the products were considered. The mass spectra of ditelluroacetals revealed unusual rearrangement of the molecular ion, leading to the formation of Te-Te and new C-C bond.
Reaction of tellurium with dichloromethane in the system hydrazine hydrate-alkali
Levanova,Grabel'Nykh,Russavskaya,Klyba,Albanov,Korchevin
experimental part, p. 2321 - 2327 (2010/05/15)
Tellurium reacts with dichloromethane in the system hydrazine hydrate-alkali substituting one chlorine atom by tellurium whereas the second chlorine atom undergoes reductive substitution by hydrogen leading to the formation of methyltellanyl derivatives.
Reactions of dichloromethane with chalcogens and dimethyl chalcogenides in the hydrazine hydrate-alkali system
Levanova,Vshivtsev,Sukhomazova,Grabel'nykh,Russavskaya,Zhanchipova,Klyba,Albanov,Korchevin
experimental part, p. 1734 - 1741 (2009/02/07)
Methods of synthesis of compounds MeY(CH2Y) n Me (Y=S, Se, Te; n = 1-3) containing several identical or different chalcogen atoms are suggested. The methods are based on the reactions of dichloromethane with elemental chalcogens (Ys
