Methanedithiol
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Names | |
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Preferred IUPAC name Methanedithiol | |
Other names Dimercaptomethane | |
Identifiers | |
CAS Number |
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3D model (JSmol) |
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ChemSpider |
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ECHA InfoCard | 100.166.842 ![]() |
PubChem CID |
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CompTox Dashboard (EPA) |
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InChI
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Properties | |
Chemical formula | CH4S2 |
Molar mass | 80.16 g·mol−1 |
Appearance | Colorless liquid |
Boiling point | 58 °C (136 °F; 331 K) |
Refractive index (nD) | 1.581 |
Hazards | |
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Pictograms | ![]() |
Warning | |
Hazard statements | H226 |
Precautionary statements | P210, P233, P240, P241, P242, P243, P280, P303+P361+P353, P370+P378, P403+P235, P501 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references |
Chemical compound
Methanedithiol is an organosulfur compound with the formula H2C(SH)2. A seldom used chemical, it form when formaldehyde reacts with hydrogen sulfide under pressure:
- CH2O + 2 H2S → H2C(SH)2 + H2O
This reaction competes with formation of trithiane:
- 3 H2C(SH)2 → [H2CS]3 + 3 H2S
Methanedithiol forms a solid dibenzoate derivative upon treatment with benzoic anhydride:[1]
- 3 H2C(SH)2 + 2 (C6H5CO)2O → H2C[SC(O)C6H5]2 + 2 C6H5CO2H
Methanetrithiol is also known.
References
- ^ Cairns, T. L.; Evans, G. L.; Larchar, A. W.; McKusick, B. C. (1952). "gem-Dithiols". Journal of the American Chemical Society. 74 (16): 3982–9. doi:10.1021/ja01136a004.