Dimethyl selenide

Last updated
Dimethyl selenide
Dimethylselenide.svg
Dimethyl-selenide-from-MW-3D-bs-17.png
Names
Preferred IUPAC name
(Methylselanyl)methane
Other names
methylselenide
Identifiers
3D model (JSmol)
1696848
ChEBI
ChemSpider
ECHA InfoCard 100.008.918 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 209-807-4
KEGG
PubChem CID
UNII
  • InChI=1S/C2H6Se/c1-3-2/h1-2H3
    Key: RVIXKDRPFPUUOO-UHFFFAOYSA-N
  • C[Se]C
Properties
C2H6Se
Molar mass 109.041 g·mol−1
Appearancecolorless 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
GHS labelling:
GHS-pictogram-exclam.svg GHS-pictogram-silhouette.svg GHS-pictogram-pollu.svg
Warning
H301, H331, H373, H410
P260, P261, P264, P270, P271, P273, P301+P310, P304+P340, P311, P314, P321, P330, P391, P403+P233, P405, P501
Related compounds
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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]

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]

References

  1. Michalke, K.; Wickenheiser, E. B.; Mehring, M.; Hirner, A. V.; Hensel, R. (2000). "Production of volatile derivatives of metal(loid)s by microflora involved in anaerobic digestion of sewage sludge". Applied and Environmental Microbiology. 66 (7): 2791–2796. Bibcode:2000ApEnM..66.2791M. doi:10.1128/AEM.66.7.2791-2796.2000. PMC   92074 . PMID   10877769.
  2. Chasteen, Thomas G.; Bentley, Ronald (2003). "Biomethylation of Selenium and Tellurium: Microorganisms and Plants". Chemical Reviews . 103 (1): 1–26. doi:10.1021/cr010210+. PMID   12517179.
  3. Atkinson, Roger; Aschmann, Sara M.; Hasegawa, David; Thompson-Eagle, Elisabeth T.; Frankenberger Jr., William T. (1990). "Kinetics of the atmospherically important reactions of dimethyl selenide". Environmental Science and Technology . 24 (9): 1326–1332. Bibcode:1990EnST...24.1326A. doi:10.1021/es00079a005.
  4. William M. Haynes, ed. (2016). CRC Handbook of Chemistry and Physics (97th ed.). CRC Press. p. 9–41. ISBN   978-1498754293.
  5. Beecher, James F. (1966). "Microwave spectrum, dipole moment, structure, and internal rotation of dimethyl selenide". Journal of Molecular Spectroscopy . 21 (1–4): 414–424. Bibcode:1966JMoSp..21..414B. doi:10.1016/0022-2852(66)90165-2.
  6. Wells, A. F. (1984). Structural Inorganic Chemistry (5th ed.). Oxford University Press. p. 705. ISBN   978-0-19-965763-6.
  7. Goldish, Elihu; Hedberg, Kenneth; Marsh, Richard E.; Schomaker, Verner (1955). "An Electron Diffraction Investigation of Dimethyl Selenide". Journal of the American Chemical Society . 77 (11): 2948–2949. Bibcode:1955JAChS..77.2948G. doi:10.1021/ja01616a005.