Dimethyl selenide
Chemical compound / From Wikipedia, the free encyclopedia
Dimethyl selenide is the organoselenium compound with the formula (CH3)2Se. This colorless, malodorous, liquid is the simplest selenoether. It occurs in trace amounts in anaerobic environments[1] and in the atmosphere due to biomethylation of selenium.[2][3]
Quick Facts Names, Identifiers ...
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Preferred IUPAC name
(Methylselanyl)methane | |
Other names
methylselenide | |
Identifiers | |
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3D model (JSmol) |
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1696848 | |
ChEBI | |
ECHA InfoCard | 100.008.918 |
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CompTox Dashboard (EPA) |
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Properties | |
C2H6Se | |
Molar mass | 109.041 g·mol−1 |
Appearance | colorless liquid |
Density | 1.4077 g/cm3 (14.6 °C) |
Melting point | −87.2 °C (−125.0 °F; 186.0 K) |
Boiling point | 55 °C (131 °F; 328 K) |
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H301, H331, H373, H410 | |
P260, P261, P264, P270, P271, P273, P301+P310, P304+P340, P311, P314, P321, P330, P391, P403+P233, P405, P501 | |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Dimethyl selenide is prepared by treating Se2− sources with electrophilic methylating agents such as methyl iodide:
- Na2Se + 2 CH3I → (CH3)2Se + 2 NaI
The carbon–selenium bond length is 1.943 Å and the C–Se–C bond angle is 96.2°, as determined by microwave spectroscopy.[4][5] Similar dimensions of 1.98 Å and 98° are found by gas electron diffraction.[6][7]