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*  Organoselenium chemistry
Organoselenium compounds are found at trace levels in ambient waters, soils and sediments. The first organoselenium compound ... Organoselenium compounds are chemical compounds containing carbon-to-selenium chemical bonds. Organoselenium chemistry is the ... Selenourea is an example of a stable compound containing a C=Se bond. Selenium, in the form of organoselenium compounds, is an ... the easy oxidation of divalent selenium compounds. Vinylic selenides are organoselenium compounds that play a role in organic ...
*  Selenium
In these compounds, selenium plays a role analogous to that of sulfur. Another naturally occurring organoselenium compound is ... Small amounts of organoselenium compounds are used to modify the vulcanization catalysts for the production of rubber. The ... of one of the ingredients used in a vitamin/mineral supplement compound that had been incorrectly compounded by a compounding ... Se compounds confer a red color to glass. This color cancels out the green or yellow tints that arise from iron impurities ...
*  Selenenic acid
A selenenic acid is an organoselenium compound and an oxoacid with the general formula RSeOH, where R ≠ H. It is the first ... Selenenic acids are believed to be transient intermediates in a number of redox reactions involving organoselenium compounds. ... Many organoselenium compounds (selenenamides, diaryl diselenides) contain "interesting" biological activities. Their activity ... doi:10.1021/jo982039g H. J. Reich, C. P. Jasperse, "Organoselenium chemistry. Preparation and reactions of 2,4,6-tri-tert- ...
*  Selenol
2 C6H5SeH + Br2 → (C6H5Se)2 + 2 HBr Organoselenium compounds (or any selenium compound) are cumulative poisons despite the fact ... Selenols are one of the principal classes of organoselenium compounds. The best known member is the amino acid selenocysteine. ... has been invoked to explain the anticancer activity of certain organoselenium compounds. Precursors of methaneselenol are under ... Selenols are organic compounds that contain the functional group with the connectivity C-Se-H. Selenols are sometimes also ...
*  Benzeneselenol
The compound is intensely malodorous and, like other organoselenium compounds, toxic. Sonoda, N.; Ogawa, A.; Recupero, F. (2005 ... Benzeneselenol is the organoselenium compound with the formula C6H5SeH, often abbreviated PhSeH. It is the selenium analog of ... Both compounds dissolve in water upon the addition of base. In organic synthesis benzeneselenol is converted to its conjugate ... This colourless, intensely malodorous compound is a useful reagent in organic synthesis. Benzeneselenol is prepared via the ...
*  Diphenyl diselenide
Reich, H. J.; Cohen, M. L.; Clark, P. S. (1979). "Reagents for Synthesis of Organoselenium Compounds: Diphenyl Diselenide and ... Diphenyl diselenide is the chemical compound with the formula (C6H5)2Se2, abbreviated Ph2Se2 This orange-coloured solid is the ... This sequence is a powerful method for the conversion of carbonyl compounds to their α,β-unsaturated analogs. Diphenyl ... Reich, H. J.; Wollowitz, S. (1993). "Preparation of α,β-Unsaturated Carbonyl Compounds and Nitriles by Selenoxide Elimination ...
*  Selenourea
... is the organoselenium compound with the formula SeC(NH2)2. It is a white solid. This compound features a rare ... few studies have been done on the compound due to the instability and toxicity of selenium compounds. The compound was first ... The compound is used in the synthesis of selenium heterocycles. Compared to urea, the oxo-analog of selenourea, ...
*  Selenium in biology
The organoselenium compound ebselen is a drug used to supplement the action of GSH-Px. It functions as a catalyst for the ... The selenium compound kills the scalp fungus Malassezia, which causes shedding of dry skin fragments. The ingredient is also ... This process leaches natural soluble selenium compounds (such as selenates) into the water, which may then be concentrated in ... Selenium also occurs in organic compounds, such as dimethyl selenide, selenomethionine, selenocysteine and methylselenocysteine ...
*  Selenium pollution
Organoselenium compounds can be concentrated over 200,000 times by zooplankton when water concentrations are in the 0.5 to 0.8 ...
*  Garlic breath
Identification of Natural Abundance Organoselenium Compounds in Human Breath after Ingestion of Garlic using Gas Chromatography ... Various other sulfur compounds are also produced when allicin in garlic is broken down in the stomach and liver. Out of the ... AMS is the only one of the garlic-derived organosulfur compounds detectable in the lungs or urine, as well as the mouth, which ... The major volatile compounds responsible for garlic breath are allyl methyl sulfide, allyl methyl disulfide, allyl mercaptan, ...
*  Sodium selenide
With alkyl halides, one obtains a variety of organoselenium compounds: Na2Se + 2 RBr → R2Se + 2 NaBr Organotin and ... Na2Se + 2 HCl → H2Se + 2 NaCl The compound reacts with electrophiles to produce the selenium compounds. ... Sodium selenide is an inorganic compound of sodium and selenium with the chemical formula Na2Se. This colourless solid is ...
*  Seleninic acid
A seleninic acid is an organoselenium compound and an oxoacid with the general formula RSeO2H, where R ≠ H. It is a member of ... The parent member of this family of compounds is methaneseleninic acid (CH3SeO2H), also known as methylseleninic acid or "MSA ... the family of organoselenium oxoacids, which also includes selenenic acids and selenonic acids, which are RSeOH and RSeO3H, ...
*  Organotellurium chemistry
... and Analysis of Organoselenium and Organotellurium Compounds in the Environment. Metal Ions in Life Sciences. 7, ... Organotellurium compounds have few applications. Dimethyl telluride is used to in the metalorganic vapour phase epitaxy where ... Because Te is insoluble and polymeric, it is often not a useful precursor to organotellurium compounds, but it is attacked by ... It is the only organotellurium compound that has been quantified in environmental samples. Diphenyl ditelluride is used as a ...
*  Selenium yeast
Pappas A, Acamovic T, Surai PF, McDevitt R. Maternal organo-selenium compounds and polyunsaturated fatty acids affect progeny ... Lobinski R, Edmonds J, Suzuki K, Uden P (2000). "Species-selective determination of selenium compounds in biological materials ...
*  Selenoxide elimination
Usually, simple phenylseleno compounds are used in elimination reactions; although 2-nitrophenylselenides react more quickly, ... Reich, Hans J.; Renga, James M.; Reich, Ieva L. (July 1974). "Organoselenium chemistry. Conversion of cyclic ketones and .beta ... 12) For β-dicarbonyl compounds, DDQ can be used as an oxidizing agent in the synthesis of enediones. Additionally, some ... It is most commonly used to synthesize α,β-unsaturated carbonyl compounds from the corresponding saturated analogues. After the ...
*  Metalloid
1-56, ISBN 0471899933 Craig PJ & Maher WA 2003, 'Organoselenium compounds in the environment', in Organometallic Compounds in ... Most of its known compounds resemble those of iodine, which is a halogen and a nonmetal. Such compounds include astatides (XAt ... Germanium generally forms tetravalent (IV) compounds, and it can also form less stable divalent (II) compounds, in which it ... Metallic antimony is relatively non-toxic, but most antimony compounds are poisonous. Two antimony compounds, sodium ...
*  Ei mechanism
Depending on the compound, elimination takes place through a four, five, or six-membered transition state. The elimination must ... 43 1697-. Grieco, P.A.; Gilman, S.; Nishizawa, M. (1976). "Organoselenium Chemistry. A Facile One-Step Synthesis of Alkyl Aryl ... Compounds that undergo elimination through cyclic transition states upon heating, with no other reagents present, are given the ... Syn Elimination of Alkyl Iodoso Compounds". J. Am. Chem. Soc. 100 4888-.. ...
*  Picrotoxin
... , also known as cocculin, is a poisonous crystalline plant compound. It was first isolated by the French pharmacist ... an organoselenium-mediated reduction of an epoxy ketone, and a stereospecific construction of a glycidic ester. The last steps ... Picrotoxin is an equimolar mixture of two compounds, picrotoxinin (C15H16O6; CAS# 17617-45-7) and picrotin (C15H18O7; CAS# ... A mixture of two different compounds, picrotoxin occurs naturally in the fruit of the Anamirta cocculus plant, although it can ...
*  Ebselen
... (also called PZ 51, DR3305, and SPI-1005), is a synthetic organoselenium drug molecule with anti-inflammatory, anti- ... Engman, Lars; Hallberg, Anders (1989-06-01). "Expedient synthesis of ebselen and related compounds". The Journal of Organic ...
*  Extinction event
... elemental Se and organo-selenium complexes. Bio-availability of selenium during these extinction events dropped to about 1% of ... Mass extinctions are thought to result when a long-term stress is compounded by a short term shock. Over the course of the ...