1202-36-4Relevant articles and documents
Hypervalent iodine in synthesis. VI. The electrophilic arylation of diaryliodonium salts to sodium telluride
You,Chen
, p. 1441 - 1444 (1992)
Diaryliodonium salts readily take place electrophilic arylation at Te to afford symmetrical diaryl tellurides in good yields.
Sodium telluride in N-methyl-2-pyrrolidone: An efficient telluration system for the synthesis of aromatic tellurides and ditellurides
Suzuki,Nakamura
, p. 549 - 551 (1992)
Sodium telluride prepared in situ from tellurium and sodium hydride in N-methyl-2-pyrrolidone was found to act as an efficient tellurating agent for nonactivated aromatic iodides, providing a simple route to a variety of diaryl tellurides, alkyl aryl tellurides and diaryl ditellurides.
Co2(CO)8-mediated and -catalyzed carbonylation of diaryl diselenides and ditellurides to seleno and telluro esters
Takahashi, Hidetaka,Ohe, Kouichi,Uemura, Sakae,Sugita, Nobuyuki
, p. C43 - C45 (1987)
Diaryl diselenides and ditellurides react with CO (5-100 atm) at 100-200 deg C in the presence of Co2(CO)8 to give the corresponding seleno and telluro esters in 21-96percent yield.The carbonylation proceeds catalytically in Co2(CO)8 in the presence of triphenylphosphine.It was shown unambiguously that benzoylcobalt tetracarbonyl, which is one of possible intermediates, reacts with diphenyl diselenide or ditelluride to give phenyl selenobenzoate or tellurobenzoate, respectively.
Phase transfer catalysis in synthesis of organylthio(organyltelluro) acetylenes
Martynov, Alexander V.,Mirskova, Anna N.,Le Guillanton, Georges
, p. 245 - 250 (1998)
Phase transfer reaction of diorganyl ditellurides with organyl-2,2-dichlorovinyl sulfides, using as phase transfer catalysts benzyltriethylammonium chloride or 18-crown-6 ether, was used as a new general method to prepare organylthio(organyltelluro)acetylenes R-S-C≡C-Te-R′. The organyltellurolate anion formed in the presence of NaOH is the reaction intermediate.
Reaction of arylhydrazines with diaryl ditellurides in the air: Insight into bimolecular homolytic substitution on tellurium via Aryl–Te bond cleavage
Yamamoto, Yuki,Sato, Fumiya,Kodama, Shintaro,Nomoto, Akihiro,Ogawa, Akiya
, (2018)
The reactivity of diaryl ditelluride and diaryl telluride toward aryl radicals was studied in detail. Diphenyl ditelluride underwent a bimolecular homolytic substitution (SH2) reaction with a phenyl radical generated from phenylhydrazine in the air, to afford diphenyl telluride in excellent yield. Based on this diphenyl telluride synthesis, a one-pot synthesis of unsymmetrical diaryl tellurides was developed by the SH2 reaction of in situ generated diphenyl telluride with arylhydrazines in the air. The selectivity of mono-/di-substitution and the reactivity of arylhydrazines depend on the nature of the substituents on the arylhydrazines, that is, electron-donating or -withdrawing group.
Catalyst free one-pot synthesis of symmetrical diaryl tellurides with Te0/KOH
Zhang, Shaozhong,Karra, Kranthi,Koe, Adam,Jin, Jin
, p. 2452 - 2454 (2013)
A highly efficient new protocol for C-Te bond formation leading to symmetrical diaryl tellurides has been developed. The synthesis employed aryl iodides and elemental tellurium as starting materials in the presence of KOH. It is a one-pot reaction without using any catalyst. Utilizing this new protocol, a variety of aryl and heteroaryl iodides are reacted with elemental tellurium to afford the corresponding diaryl tellurides in good to excellent yields.
Moessbauer studies of after effects of Auger ionization following internal conversion in organo-(129m)tellurium compounds
Nath, Amar,Sauer, Ch.,Halpern, A.
, p. 5125 - 5128 (1983)
The after effects of Auger ionization in diphenyl-telluride, dibenzyl telluride, and their dispersions in a solvent at 4.2 K, were compared with the same systems labeled with tellurium in the ground state, viz. 129Te.The Moessbauer emission, in the former case is preceded by Auger event and β decay, while in the latter case, it is preceded only by β decay.Three species were observed in the two compounds, I-, C6H5I or C6H5CH2I, and the third one has tentatively been identified as (C6H5)2I+ or (C6H5CH2)2I+.The formation of I- represents rupture of both bonds, i.e., complete fragmentation of the molecule.The probability of fragmentation was estimated with the help of matrix isolation experiments, as the electronically excited tellurium-129 ion formed by fragmentation of the molecule, following the Auger ionization, may interact with a neighboring organo-tellurium molecule in neat compounds, and enter combination.In about 85percent of the events in case of diphenyl telluride and 55percent in case of dibenzyl telluride, molecules escape complete fragmentation despite the fact that about 100 eV excitation energy may be deposited during charge neutralization.A novel mode for rapid disposal of energy is discussed.
Trichloroisocyanuric Acid-Promoted Synthesis of Arylselenides and Aryltellurides from Diorganyl Dichalcogenides and Arylboronic Acids at Ambient Temperature
Sun, Nan,Zheng, Kai,Sun, Pengyuan,Chen, Yang,Jin, Liqun,Hu, Baoxiang,Shen, Zhenlu,Hu, Xinquan
, p. 3577 - 3584 (2021/06/15)
A transition-metal-free method for the synthesis of arylselenides and aryltellurides has been established based on the oxidative cross-coupling between diorganyl dichalcogenides and aryl boronic acids. With trichloroisocyanuric acid as an oxidant, the reaction proceeded smoothly to afford the desired products in 45–97% yields at ambient temperature. Three reaction reagents used in this method are stoichiometric and the oxidation by-product isocyanuric acid can be easily isolated and recovered. Besides of arylboronic acids, aryl trifluoroborates and aryl trihydroxyborates salts are also able to perform this transformation. (Figure presented.).
Chalcogen-Bonding Catalysis with Telluronium Cations
Aubert, Emmanuel,Mamane, Victor,Pale, Patrick,Weiss, Robin
supporting information, p. 19281 - 19286 (2021/07/25)
Chalcogen bonding results from non-covalent interactions occurring between electrodeficient chalcogen atoms and Lewis bases. Among the chalcogens, tellurium is the strongest Lewis acid, but Te-based compounds are scarcely used as organocatalysts. For the first time, telluronium cations demonstrated impressive catalytic properties at low loadings in three benchmark reactions: the Friedel–Crafts bromination of anisole, the bromolactonization of ω-unsaturated carboxylic acids and the aza-Diels–Alder between Danishefsky's diene and imines. The ability of telluronium cations to interact with a Lewis base through chalcogen bonding was demonstrated on the basis of multi-nuclear (17O, 31P, and 125Te) NMR analysis and DFT calculations.
Late to the Party: Synthesis and Characterization of Tellurium and Selenium Half-Sandwich Complexes
Bart, Suzanne C.,Jones, Leighton O.,Kieser, Jerod M.,Schatz, George C.,Uible, Madeleine C.,Zeller, Matthias
supporting information, p. 4104 - 4109 (2021/12/17)
We report the synthesis and characterization of the first series of tellurium and selenium complexes featuring an ν5-cyclopentadienyl ligand. Reaction of Ph3TeX (X = Cl, S2CNEt2) with MCpR (M = Li, K; R = H, Me4, Me5) results in high yields of [Cp][TePh3] (1), [CpMe4][TePh3] (2), and [Cp*][TePh3] (3), respectively. Similarly, reaction of Ph3SeCl with LiCp and KCp? furnishes [Cp][SePh3] (4) and [Cp*][SePh3] (5). Each was characterized by X-ray crystallography, revealing similar ν5-coordination with little distortion from an idealized half-sandwich geometry, presumably from the remaining lone pair on tellurium and selenium. The Te-centroid distances are relatively long (1: 2.770(3), 2: 2.746(1), and 3: 2.733(1) ?), suggesting a mostly ionic interaction. Se-centroid distances (4: 2.748(3), 5: 2.707(2), 2.730(2) ?) were found to be surprisingly similar despite its smaller atomic radius. Compounds 2, 3, and 5 display rapid decomposition at room temperature, extruding a phenylated cyclopentadiene and the respective diphenylchalcogenide. The nature of bonding within these complexes was investigated through DFT methods and found to be primarily ionic in nature.
