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Organotellurium Compound (organotellurium + compound)

Distribution by Scientific Domains
Chemistry40%

Selected Abstracts

First Application of Ionic Liquid to Reactions Involving Organotellurium Compounds as Intermediates.

CHEMINFORM, Issue 49 2005
Lei Wang
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Probing the antioxidative properties of combinations of an organotellurium compound, BHT and thiol in oil

LUBRICATION SCIENCE, Issue 2 2006
David Shanks
Abstract Differential scanning calorimetry experiments with an unsaturated polyolester oil at 190°C showed that an organotellurium compound in combination with a thiol or a sterically hindered phenol (BHT) could act in a synergistic fashion to protect the material from oxidation. Under more realistic conditions for an oil antioxidant (elevated temperature in the presence of oxygen, water and a copper coil; rotating pressure vessel oxidation test) the antioxidant protection offered by the organotellurium/thiol and organotellurium/BHT combinations could not match the protection offered by BHT itself at similar concentrations. In order for the novel antioxidant systems to become useful for protection of oils and fluids, more robust organotellurium compounds must be prepared. Copyright © 2006 John Wiley & Sons, Ltd. [source]

Synthesis, characterization, and solution properties of some new organotellurium compounds based on di(cyclohexylmethyl)telluride

HETEROATOM CHEMISTRY, Issue 1 2007
Ali Z. Al-Rubaie
A new series of organotellurium(IV) compounds based on di(cyclohexylmethyl)telluride (1) (i.e., (C6H11CH2)2TeX2 and (C6H11CH2)2Te(R)X) was prepared by the reaction of compound 1 with halogens, N-bromosuccinimide, and alkyl halides. Phenylation of (C6H11CH2)2TeX2 with sodium tetraphenylborate gave di(cyclohexylmethyl)phenyltelluronium tetraphenylborate in good yield. Conductivity measurements in dimethylsulfoxide (DMSO) showed a considerable ionic character of these compounds and they behave as 1:1 electrolytes. 1H NMR studies in CDCl3 solution indicated that telluronium salts employed in this study are unstable toward reductive elimination. Reaction of di(cyclohexylmethyl)telluride, (C6H11CH2)2Te(CH3)I, and (C6H11CH2)2Te(PhCH2)Br with HgX2 (X = Cl or Br) afforded 1:1 complexes. All compounds were characterized by elemental analyses and spectroscopic data. © 2007 Wiley Periodicals, Inc. Heteroatom Chem 18:93,99, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20240 [source]

Probing the antioxidative properties of combinations of an organotellurium compound, BHT and thiol in oil

LUBRICATION SCIENCE, Issue 2 2006
David Shanks
Abstract Differential scanning calorimetry experiments with an unsaturated polyolester oil at 190°C showed that an organotellurium compound in combination with a thiol or a sterically hindered phenol (BHT) could act in a synergistic fashion to protect the material from oxidation. Under more realistic conditions for an oil antioxidant (elevated temperature in the presence of oxygen, water and a copper coil; rotating pressure vessel oxidation test) the antioxidant protection offered by the organotellurium/thiol and organotellurium/BHT combinations could not match the protection offered by BHT itself at similar concentrations. In order for the novel antioxidant systems to become useful for protection of oils and fluids, more robust organotellurium compounds must be prepared. Copyright © 2006 John Wiley & Sons, Ltd. [source]