- Improved selectivity for Pb(II) by sulfur, selenium and tellurium analogues of 1,8-anthraquinone-18-crown-5: Synthesis, spectroscopy, X-ray crystallography and computational studies
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We report here a series of heteroatom-substituted macrocycles containing an anthraquinone moiety as a fluorescent signaling unit and a cyclic polyheteroether chain as the receptor. Sulfur, selenium, and tellurium derivatives of 1,8-anthraquinone-18-crown-5 (1) were synthesized by reacting sodium sulfide (Na2S), sodium selenide (Na2Se) and sodium telluride (Na2Te) with 1,8-bis(2-bromoethylethyleneoxy)anthracene-9,10-dione in a 1:1 ratio. The optical properties of the new compounds are examined and the sulfur and selenium analogues produce an intense green emission enhancement upon association with Pb(ii) in acetonitrile. Selectivity for Pb(ii) is markedly improved as compared to the oxygen analogue 1 which was also competitive for Ca(ii) ion. UV-Visible and luminescence titrations reveal that 2 and 3 form 1:1 complexes with Pb(ii), confirmed by single-crystal X-ray studies where Pb(ii) is complexed within the macrocycle through coordinate covalent bonds to neighboring carbonyl, ether and heteroether donor atoms. Cyclic voltammetry of 2-8 showed classical, irreversible oxidation potentials for sulfur, selenium and tellurium heteroethers in addition to two one-electron reductions for the anthraquinone carbonyl groups. DFT calculations were also conducted on 1, 2, 3, 6, 6 + Pb(ii) and 6 + Mg(ii) to determine the trend in energies of the HOMO and the LUMO levels along the series.
- Mariappan, Kadarkaraisamy,Alaparthi, Madhubabu,Hoffman, Mariah,Rama, Myriam Alcantar,Balasubramanian, Vinothini,John, Danielle M.,Sykes, Andrew G.
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- Synthesis and Thorough Investigation of Discrete Organotin Telluride Clusters
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Systematic experimental and theoretical investigations of reactions of R1SnCl3 (R1=CMe2CH2C(Me)O) with (Me3Si)2Te allowed for the stepwise formation and single-crystalline isolation of the first tin sesquitelluride clusters with functional organic ligands. Subsequent derivatization of the latter took place under reorganization of the inorganic core, affording clusters with complex hybrid architectures.
- Eussner, Jens P.,Kusche, Ralph O.,Dehnen, Stefanie
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- Preparation and reactions of sodium telluride, Na2Te - Crystal structure of [Na(CH3OH)3]2Te2
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Sodium telluride, Na2Te 1, is easily obtained by reaction of sodium with hexagonal tellurium in 1,2-dimethoxy-ethane in the presence of catalytic amounts of naphthalene. Upon exposure to oxygen 1 reacts with methanol forming [Na(CH3O
- Thiele,Steinicke,Dümichen,Neumüller
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- Coordination responsive tellurium-containing multilayer film for controlled delivery
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A coordination-responsive tellurium containing film was fabricated for controlled release. The coordination chemistry between telluride molecules and cisplatin was utilized for the loading of cisplatin, while competitive ligands were used for triggered release. This work could enrich the coordination responsive system and further tune the release kinetics of cisplatin. This journal is
- Cao, Wei,Wang, Lu,Xu, Huaping
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- Highly reversible Na-ion reaction in nanostructured Sb2Te3-C composites as Na-ion battery anodes
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Sb2Te3 and its amorphous carbon-modified nanocomposite (Sb2Te3-C) are synthesized by simple solid-state synthetic methods, and their potential as anode materials for rechargeable Na-ion batteries (NIBs) is evaluated. Ex situ X-ray diffraction and high-resolution transmission electron microscopy clearly demonstrate the sodiation/desodiation reaction mechanism of the Sb2Te3 and Sb2Te3-C nanocomposite electrodes. In both electrodes, Sb2Te3 is converted into Na3Sb and Na2Te during Na insertion. However, Na3Sb and Na2Te in only the Sb2Te3-C nanocomposite electrode recombine into the original Sb2Te3 phase after full Na extraction. As a consequence of its interesting conversion/recombination reaction during sodiation/desodiation reaction, the Sb2Te3-C nanocomposite electrode exhibits a long cycle life with highly reversible gravimetric and volumetric capacity (373 mAh g-1 and 765 mAh cm-3 over 50 cycles) and fast rate capability (1 C: 391 mAh g-1 and 802 mAh cm-3; 2 C: 377 mAh g-1 and 773 mAh cm-3).
- Nam, Ki-Hun,Choi, Jeong-Hee,Park, Cheol-Min
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- Synthesis of Diphenylchalcogenophene Diboronic Acid Bis(pinacol) Esters and Halogen Photoelimination from Tellurium by Triplet–Triplet Annihilation
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The synthesis of diphenylthiophene-, diphenylselenophene-, and diphenyltellurophene-based diboronic bis(pinacol) esters and their optoelectronic properties is reported. The addition of bromine to the borylated diaryltellurophene and subsequent photoelimination are investigated. The photochemical quantum yield of bromine photoelimination is (9.7±0.2) % at a 4.4 m trap (2,3-dimethyl-1,3-butadiene) concentration. It is found that the bromine photoelimination reaction can also be driven by the incorporation of a triplet sensitizer through a triplet–triplet annihilation process.
- Li, Peng-Fei,Carrera, Elisa I.,Seferos, Dwight S.
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- New Forms of CdSe: Molecular Wires, Gels, and Ordered Mesoporous Assemblies
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This work investigates the structure and properties of soluble chalcogenidocadmates, a molecular form of cadmium chalcogenides with unprecedented one-dimensional bonding motifs. The single crystal X-ray structure reveals that sodium selenocadmate consists of infinite one-dimensional wires of (Cd2Se3)n2n- charge balanced by Na+ and stabilized by coordinating solvent molecules. Exchanging the sodium cation with tetraethylammonium or didodecyldimethylammonium expands the versatility of selenocadmate by improving its solubility in a variety of polar and nonpolar solvents without changing the anion structure and properties. The introduction of a micelle-forming cationic surfactant allows for the templating of selenocadmate, or the analogous telluride species, to create ordered organic-inorganic hybrid CdSe or CdTe mesostructures. Finally, the interaction of selenocadmate “wires” with Cd2+ ions creates an unprecedented gel-like form of stoichiometric CdSe. We also demonstrate that these low-dimensional CdSe species show characteristic semiconductor behavior, and can be used in photodetectors and field-effect transistors.
- Hudson, Margaret H.,Dolzhnikov, Dmitriy S.,Filatov, Alexander S.,Janke, Eric M.,Jang, Jaeyoung,Lee, Byeongdu,Sun, Chengjun,Talapin, Dmitri V.
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- 125Te NMR SPECTRA OF TELLURIUM HETEROCYCLES
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The 125Te chemical shifts and 125Te-1H coupling constants for the heterocycle 1,3-dihydrobenzotellurophene and its dihalo oxidation products have been measured and shown to correlate with the oxidation state of the tellurium and the electronegativity of the halo substituent.Halogen exchange in mixed dihalides has also been monitored by 125Te NMR.Examination of typical Te-compounds in the oxidation states -II, +II and +IV reveals a chemical shift range of 3,500 ppm.
- Zymbulyadis, N.,Gysling, H.J.
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- Synthesis, structure and reactivity of cyclopropenyl-1-ylidene stabilized S(ii), Se(ii) and Te(ii) mono- and dications
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The syntheses and structural characterization of carbene-stabilized chalcogen centred mono- and dications employing a reverse electron demand onio-substitutent transfer strategy are reported. The electronic structures of these compounds were determined by density functional calculations and their reactivity towards Pd(0) centres was evaluated.
- Kozma, Agnes,Petuskova, Jekaterina,Lehmann, Christian W.,Alcarazo, Manuel
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- Sodium Substitution in Lead Telluride
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Sodium is widely used as a substituting element in p-type PbTe-based thermoelectric materials. In this work, two series of polycrystalline samples Pb1-yNayTe1-y/2 (total charge balance) and Pb1-xNaxTe (total charge nonbalance) were examined. Na has limited solubility for both of the series. The MAS 23Na NMR analysis of Pb1-xNaxTe series (for Pb0.98Na0.02Te sample after spark-plasma sintering, SPS) reveals only one Na signal, corresponding to Na atoms coordinated by six Te atoms, indicating substitution of Pb by Na without defects in the Te sublattice. In the Pb1-yNayTe1-y/2 series, clustering of Na atoms with reduced coordination by Te was observed. Additional heat treatment of these samples leads to the reorganization of the Na clusters in PbTe and their equilibration with the homogenized distribution of Na in the whole volume. The maximum ZT values of 1.4-1.6 at 760 K are established for both Pb1-xNaxTe and Pb1-yNayTe1-y/2 series. Upon long-time annealing at 873 K, reorganization and redistribution of Na atoms lead to the change in carrier concentration and, consequently, the thermoelectric properties for both series.
- Wang, Xinke,Veremchuk, Igor,Bobnar, Matej,Burkhardt, Ulrich,Zhao, Jing-Tai,Grin, Yuri
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- Nitrile functionalized organogermane chalcogenide clusters with hetero-(nor-)adamantane cores Dedicated to Professor Heinrich Lang on the occasion of his 60th birthday.
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By the synthesis of Cl3Ge(CH2)2CN (1) and subsequent reaction with sodium monochalcogenides, adamantane-type [(NC(CH2)2Ge)4Ch6] (Ch = S (2), Se) and noradamantane-type [(NC(CH2)2Ge)4Te5] (3) were obtained. The compounds represent the first nitrile-functionalized tetrel chalcogenide clusters and the first nitrile-functionalized clusters of the named architectures, and are thus potential precursor for novel reaction pathways to multifunctional core-shell compounds.
- Heimann, Samuel,Thiele, Günther,Dehnen, Stefanie
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- Supramolecular Self-Assembled DNA Nanosystem for Synergistic Chemical and Gene Regulations on Cancer Cells
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Incorporating multiple molecular interactions within a system to realize the metabolic reprogramming of cancer cells is prospected to be of great potential in cancer therapy. Herein, we report a supramolecular self-assembled DNA nanosystem, which reprogrammed the cellular antioxidant system via synergistic chemical and gene regulations. In the nanosystem, amphipathic telluroether was coordinated with MnII to self-assemble into micelle, on which a siNrf2 integrated DNA network was assembled. The great electron-donating capability of telluroether was revealed to greatly promote MnII-based Fenton-like reaction to generate subversive .OH in cancer cells. In response to adenosine triphosphoric acid, the siNrf2 was specially released in cytoplasm for down-regulating expression of detoxification enzymes, which enhanced chemocatalysis-mediated oxidative stress in cancer cells, thus significantly suppressing tumor progression.
- Ding, Xiaohui,Dong, Yuhang,Li, Feng,Li, Shuai,Li, Zhemian,Lv, Zhaoyue,Yang, Dayong,Yao, Chi,Zhang, Xue
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supporting information
p. 25557 - 25566
(2021/11/05)
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- Rongalite-Promoted on Water Synthesis of Functionalised Tellurides and Ditellurides
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The on water reaction of sodium telluride with electrophiles has been explored. Na2Te, generated in situ through the rongalite (sodium hydroxymethanesulfinate)-promoted reduction of elemental tellurium, reacts with a wide variety of electrophil
- Capperucci, Antonella,Ricci, Lorenzo,Tanini, Damiano
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supporting information
(2020/02/11)
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- Synthesis, structure and reactivity of β-chalcocyclohexenals: Dichalcogenides and chalcogenides
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The present work describes the synthesis and characterization of a series of organochalcogen compounds derived from β-chlorocyclohexenal (27a)/β-bromocyclohexenal (27b) which are stabilized by E...O (E = S, Se, Te) intramolecular secondary bonding interaction (IM-SBI). Di-(2-formylcyclohex-1-ene)sulfide (21) was prepared by treating 27b with disodium sulfide. Di-(2-formylcyclohex-1-ene)diselenide (28) was obtained by reacting 27a with disodium diselenide. The reaction always produced a mixture of di-(2-formylcyclohex-1-ene)diselenide (28) and di-(2-formylcyclohex-1-ene)selenide (29). Attempts to synthesize di-(2-formylcyclohex-1-ene)ditelluride 30 by the reaction of 27b with disodium ditelluride afforded a mixture of monotellurides; 3,4,5,6,7,8-hexahydro-2H-9-telluraanthracene-1-carbaldehyde (26), di-(2-formylcyclohex-1-ene)telluride (22) and 9-hydroxy-2,3,5,6,7,8,9,9a-octahydro-1H-telluroxanthene-4-carbaldehyde (31). Reactions of 28 with halogenating reagents afforded the corresponding organylselenenyl halides; selenenyl chloride 35, selenenyl bromide 36 and selenenyl iodide 37. Tellurides 26 and 22 were used as ligands for metal complexation reactions.
- Prasad, Poonam R.,Singh, Harkesh B.,Butcher, Ray J.
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- Efficient halogen photoelimination from dibromo, dichloro and difluoro tellurophenes
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We present the reactivity and photochemistry of 2,5-diphenyltellurophene. A change in oxidation state from Te(II) to Te(IV) occurs by oxidative addition of bromine, chlorine, and fluorine from appropriate halogen sources. Photoreductive halogen eliminatio
- Carrera, Elisa I.,Seferos, Dwight S.
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p. 2092 - 2096
(2015/02/05)
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- The synthesis and crystal structure of K2UTe3
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Syntheses of K2UTe3 were performed via polytelluride fluxes from K2Te3 and metallic uranium in the molar ratio 2:1 at 600 to 800 °C. Well-formed crystals were isolated by washing the reguli with liquid ammonia. One-phase powder samples of K2UTe3 are also available by reactions of stoichiometric mixtures of K2Te3 and uranium. K2Te3 was prepared in liquid ammonia from the elements using a glass apparatus specially designed for the synthesis of alkali metal chalcogenides. By x-ray structure analyses of single crystals we found K2UTe3 to crystallize monoclinic (space group C2/m, Z = 4) with the lattice parameters a = 800.41(3) pm, b = 1387.67(5) pm, c = 851.63(4) pm and β = 108.495(3)°. The crystal structure of the compound may be regarded as a stuffed AlCl3-type structure. The existence of an analogous compound Rb2UTe3 crystallizing isotypically to K2UTe3 has been shown by x-ray powder investigations.
- Sto?we, Klaus,Appel-Colbus, Stephan
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p. 1647 - 1651
(2008/10/08)
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- A New Synthetic Route for the Preparation of Perfluoroorganoselenium and-tellurium Compounds
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A new synthetic route for the preparation of perfluoroorganoselenium and-tellurium compounds is presented. By the reaction of disodiumchalcogen ides Na2Ex (x=1, 2; E=Se, Te) with C6F5X or C2F5X (X=Br, I) in liquid ammonia, thf of dmf the corresponding selenium and tellurium compounds areobtained in good yields. The reaction conditions are described.
- Kasemann, R.,Lichenheim, C.,Nowicki, G.,Naumann, D.
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- The First Organoboron-Tellurium Compounds
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Na2Te and Na2Te2, prepared from Te and Na, react with 9-Cl-9-BBN to form bis(1,5-cyclooctanediylboryl) telluride (1) and bis(1,5-cyclooctandiylboryl) ditelluride (2), resp. 1 reacts with water to give elemental Te, (9-BBN)2O, and (9H-9-BBN)2. - Key
- Koester, Roland,Seidel, Guenter,Schuessler, Wilhelm,Wrackmeyer, Bernd
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- Deoxygenation of cis vicinal diols to make didehydro dideoxy nucleosidies and synthetic intermediates
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Cis vicinal diols are converted to olefins using tellurides or selenide reagents. The diol is reacted to convert the hydroxyl groups into good leaving groups for nucleophilic substitution. Alkyl and aryl sulfonate groups such as mesylate or tosylate are p
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- New cyclic tellurides, Synthesis, reaction and ligand properties of 2,2,6,6-tetramethyl-1-oxa-4-tellura-2,6-disilacyclohexane (C6H16OSi2Te). X-Ray structure determination of C6H16OSi2TeI2
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A new tellurium-containing heterocyclic compound, 2,2,6,6-tetramethyl-1-oxa-4-tellura-2,6-disilacyclohexane (C6H16OSi2Te) (1), has been prepared by treatment of 1,3-bis(chloromethyl)-1,1,3,3-tetramethyldisiloxane with sodium telluride.Mononuclear and dinu
- Al-Rubaie, Ali Z.,Uemura, Sakae,Masuda, Hideki
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p. 309 - 320
(2007/10/02)
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- Synthesis of alkali metal tellurides and ditellurides in THF and their relative reactivities towards alkyl bromides: A convenient synthesis of dialkyl tellurides and dialkyl ditellurides
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Lithium, sodium and potassium reduce smoothly elemental tellurium to telluride (Te2-) and ditelluride (Te22-) anions in the tetrahydrofuran, THF, medium in the presence of catalytic amounts of naphthalene.The relative reactivities of these alkali metal tellurides towards alkyl bromides have been investigated and a number of dialkyl tellurides and dialkyl ditellurides prepared in good to excellent yields.The compounds prepared are characterised by elemental analysis, 1H NMR and mass spectral studies.
- Bhasin, K K,Gupta, Vijay,Sharma, R P
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p. 632 - 634
(2007/10/02)
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- Synthesis and characterization of sodium polytellurides in liquid ammonia solution
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Solutions of sodium polytellurides in liquid ammonia have been studied by using UV-visible spectroscopy. The results of the investigation indicate that Na2Te2 and Na2Te3 are distinctive, spectroscopically identifiable species. During the sequential reaction of sodium and tellurium, a species postulated to be NaTe is observed spectroscopically as a precursor to Na2Te. Na2Te is either virtually insoluble in liquid ammonia or does not absorb in the spectral region 220-700 nm. The proposed species Na2Te4 was found to be a 1:1 molar mixture of Na2Te3 and insoluble excess tellurium, and no evidence for the formation of a higher polytelluride under the conditions of study was obtained. The short-lived precursor species exhibited a yellow color in the liquid ammonia solution and showed an absorption maximum at 428 nm. The spectra of the polytellurides consisted of several overlapping bands that were submitted to curve resolution procedures. Results were as follows: Na2Te2, blue solution (290.4, 329.3, 351.5, and 561.9 nm); Na2Te3, red solution (273.2, 303.0, 335.1, 374.6, and 513.5 nm).
- Schultz, Linda D.,Koehler, William H.
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p. 1989 - 1993
(2008/10/08)
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- Reduction of Aromatic Nitro Compounds and Thioketones with Sodium Telluride under Aprotic Conditions
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Sodium telluride, prepared by heating tellurium and sodium hydride in a 1:2 molar ratio in dry N,N-dimethylformamide, reduces aromatic nitro compounds to azo compounds and thioketones to hydrocarbons under mild conditions.
- Suzuki, Hitomi,Manabe, Hajime,Kawaguchi, Takashi,Inouye, Masahiko
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p. 771 - 772
(2007/10/02)
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- A CONVENIENT SYNTHESIS OF SYMMETRICAL DIARYL TELLURIDES USING TELLURIUM/RONGALITE AS TELLURATION SYSTEM
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Sodium telluride, prepared by reducing tellurium with rongalite in dilute aqueous sodium hydroxide, readily reacts with nonactivated aryl iodides to afford symmetrical diaryl tellurides in good yields.
- Suzuki, Hitomi,Inouye, Masahiko
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p. 389 - 390
(2007/10/02)
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- A MILD AND EFFICIENT DEBROMINATION OF VICINAL DIBROMOALKANES WITH SODIUM TELLURIDE PREPAED FROM TELLURIUM AND RONGALITE
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Vicinal dibromoalkanes are debrominated to alkenes with remarkable ease by treatment with sodium telluride prepared from tellurium and Rongalite in aqueous alkaline medium.
- Suzuki, Hitomi,Inouye, Masahiko
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p. 225 - 228
(2007/10/02)
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