Tetradeuteromethane
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| Names | |
|---|---|
| IUPAC name
Tetradeuteriomethane[5]
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| Other names | |
| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | Lua error in Module:Wikidata at line 879: attempt to index field 'wikibase' (a nil value). Lua error in Module:Wikidata at line 879: attempt to index field 'wikibase' (a nil value). |
| E number | Lua error in Module:Wikidata at line 879: attempt to index field 'wikibase' (a nil value). |
PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| CD 4 | |
| Molar mass | 20.067 g/mol[1] |
| Appearance | Colorless gas[1] |
| Melting point | −183 °C (−297.4 °F; 90.1 K)[1] |
| Boiling point | −161 °C (−258 °F; 112 K)[1] |
| Structure | |
| Tetrahedral at C | |
| Hazards | |
| Main hazards | Extremely flammable |
| GHS pictograms |  Template:GHS04
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| GHS Signal word | |
| <abbr class="abbr" title="Error in hazard statements">HH220, <abbr class="abbr" title="Error in hazard statements">HH280 | |
| <abbr class="abbr" title="Error in hazard statements">PP203, <abbr class="abbr" title="Error in hazard statements">PP210, <abbr class="abbr" title="Error in hazard statements">PP222, <abbr class="abbr" title="Error in hazard statements">PP280, <abbr class="abbr" title="Error in hazard statements">PP377, <abbr class="abbr" title="Error in hazard statements">PP381, <abbr class="abbr" title="Error in hazard statements">PP403, <abbr class="abbr" title="Error in hazard statements">PP410+P403 | |
| NFPA 704 (fire diamond) | <imagemap>
File:NFPA 704.svg|80px|alt=NFPA 704 four-colored diamond poly 150 150 300 300 150 450 0 300 Health 0: Exposure under fire conditions would offer no hazard beyond that of ordinary combustible material. E.g. sodium chloride poly 300 0 450 150 300 300 150 150 Flammability 4: Will rapidly or completely vaporize at normal atmospheric pressure and temperature, or is readily dispersed in air and will burn readily. Flash point below 23 °C (73 °F). E.g. propane poly 450 150 600 300 450 450 300 300 Instability (yellow): no hazard code poly 300 300 450 450 300 600 150 450 Special hazards (white): no code desc none </imagemap> |
| Flash point | −18 °C (0 °F; 255 K)[1] |
| Related compounds | |
Related compounds
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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 | |
Tetradeuteromethane, also called methane-d4 or methane-d4, is a chemical compound with the chemical formula CD
4 or C(2
H)
4, where D stands for deuterium. It is a colorless gas. It is a heavy analog of methane, where all four hydrogen atoms are replaced by deuterium atoms. The molar mass of deuterium is about twice the molar mass of hydrogen.
Synthesis
Tetradeuteromethane can be synthesized by the reaction of aluminium carbide powder Al
4C
3 with heavy water D
2O.[6]
- Al
4C
3 + 6 D
2O → 2 Al
2O
3 + 3 CD
4
It can also be synthesized by the reaction between heavy water and carbon tetrachloride in a boiling suspension of zinc.[7]
Properties
The relative molar flame ionization detection response for hydrocarbons does not change when hydrogen is replaced by deuterium. However, the exception is methane for which an inverse deuterium isotope effect of 3.5% is observed for tetradeuteromethane.[8]
Molar mass of tetradeuteromethane is 20.067 g/mol, while of methane is 16.043 g/mol. The difference between molar masses is because deuterium's molar mass is approximately twice the molar mass of hydrogen.
Uses
Tetradeuteromethane is mainly used as a nuclear magnetic resonance reagent, for modifying optoelectronics, as a laboratory reagent and for scientific research.[2]
Safety
Tetradeuteromethane is highly flammable. Readily forms explosive mixtures with air.[2] The complete combustion of tetradeuteromethane produces carbon dioxide and heavy water.
- CD
4 + 2 O
2 → CO
2 + 2 D
2O
Tetradeuteromethane is incompatible with halogens and strong oxidizing agents.[2]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 ChemSpider. "Methane-d4". www.chemspider.com. Retrieved 1 May 2026.
- ↑ 2.0 2.1 2.2 2.3 Chemical Book. "METHANE-D4". www.chemicalbook.com. Retrieved 1 May 2026.
- ↑ 3.0 3.1 Sigma-Aldrich. "Methane-d4". www.sigmaaldrich.com. Retrieved 1 May 2026.
- ↑ Kistemaker, P.G.; Hanna, M.M.; De Vries, A.E. (1974). "Rotational relaxation in mixtures of tetradeuteromethane with helium, neon, argon and xenon". Physica. 78 (3): 457–468. Bibcode:1974Phy....78..457K. doi:10.1016/0031-8914(74)90374-7.
- ↑ PubChem. "Methane-13C,d4". pubchem.ncbi.nlm.nih.gov. Retrieved 1 May 2026.
- ↑ Urey, Harold C.; Price, Donald (1 May 1934). "Observations on the Synthesis of Tetra-Deutero Methane". The Journal of Chemical Physics. 2 (5): 300. Bibcode:1934JChPh...2..300U. doi:10.1063/1.1749475.
- ↑ Leblanc, Mary Elaine; Morse, A. T.; Leitch, L. C. (1956). "Organic Deuterium Compounds: Xv. Synthesis of Some Deuterated Alkanes". Canadian Journal of Chemistry. 34 (3): 354–358. Bibcode:1956CaJCh..34..354L. doi:10.1139/v56-051.
- ↑ https://www.sciencedirect.com/science/article/abs/pii/S0021967397004834
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