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]
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Preferred IUPAC name
(Methylselanyl)methane | |
Other names
methylselenide
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Identifiers | |
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3D model (JSmol)
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1696848 | |
ChEBI |
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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) |
Hazards | |
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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).
Infobox references
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Dimethyl selenide is prepared by treating Se2− sources with electrophilic methylating agents such as methyl iodide:
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]