Dimethyl telluride

Structural formula
General
Surname	Dimethyl telluride
Molecular formula	C 2 H 6 te
Brief description	yellowish liquid
External identifiers / databases
CAS number 593-80-6 EC number 209-809-5 ECHA InfoCard 100.008.919 PubChem 68977 Wikidata Q2197890
properties
Molar mass	157.67 g mol −1
Physical state	liquid
boiling point	80 ° C
solubility	soluble in ethanol
safety instructions
GHS hazard labeling no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Dimethyl telluride with the constitutional formula Te (CH ₃ ) ₂ is a chemical compound from the group of organotellurium compounds .

Occurrence

Dimethyl telluride is formed from inorganic tellurium compounds in organisms, especially microorganisms (e.g. the fungi Penicillium brevicaule , P. chrysogenum and P. notatum as well as the bacterium Pseudomonas fluorescens ) but also in animals and humans. After exposure to tellurium or tellurium compounds, people may release the garlic-like smelling compound through their breath, sweat, urine or skin for months. The formation of dimethyl telluride in this way was discovered in 1939.

Extraction and presentation

Dimethyl telluride can be obtained by reacting sodium telluride or potassium telluride with methyl iodide .

${\displaystyle \mathrm {K_{2}Te+2\ CH_{3}I\longrightarrow (CH_{3})_{2}Te+2\ KI} }$

The reaction of trimethyl tellurium iodide with triphenylphosphine or tributylphosphine is also possible .

${\displaystyle \mathrm {(CH_{3})_{3}TeI+(C_{6}H_{5})_{3}P\longrightarrow (CH_{3})_{2}Te+(C_{6}H_{5})_{3}CH_{3}PI} }$

properties

Dimethyl telluride is a yellowish liquid with a garlic-like odor that is soluble in ethanol. In air it converts directly to dimethyl tellurium oxide .

use

Dimethyl telluride is used as a standard for gas chromatography .

safety instructions

Dimethyl telluride is toxic and damages the liver, heart, kidneys and blood.

Individual evidence

1. ↑ ^{a b c d e} William M. Haynes: CRC Handbook of Chemistry and Physics, 96th Edition . CRC Press, 2015, ISBN 978-1-4822-6097-7 , pp. 222 ( limited preview in Google Book search).
2. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
3. ↑ Rukma ST Basnayake, Janet H. Bius, Osman M. Akpolat, Thomas G. Chasteen: Production of dimethyl telluride and elemental tellurium by bacteria amended with tellurite or tellurate. In: Applied Organometallic Chemistry. 15, 2001, p. 499, doi : 10.1002 / aoc.186 .
4. ↑ ^{a b c d} Wolfgang A. Herrmann, Christian Erich Zybill: Synthetic Methods of Organometallic and Inorganic Chemistry, Volume 4, 1997 Volume 4: Sulfur, Selenium and Tellurium . Georg Thieme Verlag, 2014, ISBN 3-13-179191-8 , p. 215 ( limited preview in Google Book search).
5. ↑ Wolfgang Legrum: Fragrances, between stench and fragrance occurrence, properties and use of fragrances and their mixtures . Springer-Verlag, 2015, ISBN 978-3-658-07310-7 , pp. 90 ( limited preview in Google Book search).
6. ↑ Marjorie L. Bird, Frederick Challenger: 39. The formation of organo-metalloidal and similar compounds by micro-organisms. Part VII. Dimethyl telluride. In: Journal of the Chemical Society (Resumed). 1939, p. 163, doi : 10.1039 / JR9390000163 .
7. ↑ Adolph Strecker: Adolph Strecker's K short textbook of organic chemistry . 1874, p. 278 ( limited preview in Google Book search).
8. ↑ W. Ternes: Biochemistry of the elements Inorganic chemistry of biological processes . Springer-Verlag, 2012, ISBN 978-3-8274-3020-5 , pp. 366 ( limited preview in Google Book search).