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Selenium, compounds

Elemental selenium has been said to be practically nontoxic and is considered to be an essential trace element however, hydrogen selenide and other selenium compounds are extremely toxic, and resemble arsenic in their physiological reactions. [Pg.96]

Hydrogen selenide in a concentration of 1.5 ppm is intolerable to man. Selenium occurs in some solid in amounts sufficient to produce serious effects on animals feeding on plants, such as locoweed, grown in such soils. Exposure to selenium compounds (as Se) in air should not exceed 0.2 mg/m3 (8-hour time-weighted average - 40-hour week). [Pg.97]

This chapter is an attempt to present the important results of studies of the synthesis, reactivity, and physicochemical properties of this series of compounds. The subject was surveyed by Bulka (3) in 1963 and by Klayman and Gunther (4) in 1973. Unlike the oxazoles and thiazoles. there are few convenient preparative routes to the selenazoles. Furthermore, the selenium intermediates are difficult to synthesize and are often extremely toxic selenoamides tend to decompose rapidly depositing metallic selenium. This inconvenience can be alleviated by choice of suitable reaction conditions. Finally, the use of selenium compounds in preparative reactions is often complicated by the fragility of the cycle and the deposition of metallic selenium. [Pg.219]

The investigations of Jensen and Schmith (45) indicate that in vitro activity of 2-sulfanilamido and 4-methyl-2-sulfanilamido selenazoles against pneumonia infections is comparable to that of sulfathiazole or sulfadiazine. Frisk (47) found that the activity of the selenium compounds was much lower than that of sulfathiazole. [Pg.249]

Comparison of the ultraviolet spectra of analogous sulfur and selenium compounds shows that there is very little difference in the absorption curves, except for a slight bathochromic shift in the case of the selenium derivatives-... [Pg.274]

D. L. Klayman and W, H. H. Gunther. Organic Selenium Compounds." D. Sevferth. Ed- Wilcy-Imerscience, New York. 1973. [Pg.276]


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1.4- Dicarbonyl compounds use of selenium dioxide

Allylic compounds Selenium dioxide

Analysis of Selenium-Containing Compounds

Arsenic, Halogen, Phosphorus, Sulfur, Selenium and Nitrogen Containing Compounds

Aryl selenium compounds

Boron selenium compounds

Carbonyl compounds reactions with selenium-stabilized carbanions

Compounds of Nitrogen, Sulphur, and Selenium

Compounds of Selenium, Tellurium and Polonium

Compounds of sulfur and selenium with nitrogen

Cyclic silicon-selenium compounds

Diorgano Oxygen Sulfur (or Selenium) Tellurium Compounds

General Aspects of Selenium and Tellurium Compounds

HALOGENATION OF SULFUR AND SELENIUM COMPOUNDS

Heteroaromatic Compounds of Sulphur, Selenium, and Tellurium

Imido selenium compounds

Of selenium compounds

One-electron oxidation of selenium and tellurium compounds

Organo-selenium compounds

Organolead Compounds with Sulfur, Selenium and Tellurium

Organozinc-selenium compounds

Other Compounds of Selenium

Other Sulfur and Selenium Compounds

Oxidation selenium compounds

Oxygen-, Sulphur-, and Selenium-bonded Compounds

Parent Selenium Compounds

Radical Reactions of Selenium and Tellurium Compounds

Reactions with Sulfur and Selenium Compounds

Reduction of Selenium and Tellurium Compounds

Saturated Cyclic Compounds of Sulphur and Selenium

Saturated Cyclic Compounds of Sulphur, Selenium, and Tellurium

Selected thermodynamic data for reactions involving selenium compounds and complexes

Selenides selenium compounds

Selenium Compounds with Low Phosphorus Coordination

Selenium and compounds

Selenium and sulfur compounds

Selenium carbonyl compounds

Selenium chain compounds

Selenium compounds alkene epoxidation

Selenium compounds and complexes

Selenium compounds catalysts

Selenium compounds difluoride

Selenium compounds dimer

Selenium compounds fluorides

Selenium compounds hexafluoride

Selenium compounds hydrolysis

Selenium compounds oxidation catalysts

Selenium compounds reaction with alkenes

Selenium compounds reactions with arynes

Selenium compounds reductions

Selenium compounds secondary alcohols

Selenium compounds sodium hydride

Selenium compounds tetravalent

Selenium compounds vibrational spectra

Selenium compounds with ozone

Selenium compounds, acute toxicity

Selenium compounds, biological methylation

Selenium compounds, ease of oxidation

Selenium compounds, ease of oxidation precautions when working with

Selenium compounds, ease of oxidation sensitivity to light

Selenium coordination compounds

Selenium dioxide a,P-unsaturated carbonyl compounds

Selenium halogen compounds

Selenium heterocyclic compounds

Selenium hydrogen compounds

Selenium nitro compounds

Selenium nitrogen compounds

Selenium organometallic compounds

Selenium, trifluoromethyl compounds

Selenium-Oxygen Compounds

Selenium-Oxygen-Halogen Compounds

Selenium-carbon double bonds compounds containing

Selenium-carbon double bonds selenocarbonyl compounds

Selenium-containing compounds

Selenium-containing compounds, addition

Selenium-containing compounds, syntheses

Selenium-containing phosphorus compounds

Small-ring Compounds of Sulphur and Selenium

Sulfur or Selenium Compounds

Sulfur- and Selenium-containing Compounds

Sulphur and Selenium Compounds

Sulphur, Selenium, and Tellurium Compounds

Thiols, Sulfur, Selenium, and Tellurium Compounds

Volatile organic selenium compounds

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