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methane
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Personne àcontacter Mr. tony
Jinfeng Road,Heshun,Lishui,Nanhai, Foshan, Guangdong
Methane is a tetrahedral molecule with four equivalent C-H bonds. Its electronic structure is described by four bonding molecular orbitals (MOs) resulting from the overlap of the valence orbitals on C and H. The lowest energy MO is the result of the overlap of the 2s orbital on carbon with the in-phase combination of the 1s orbitals on the four hydrogen atoms. Above this level in energy is a triply degenerate set of MOs that involve overlap if the 2p orbitals on carbon with various linear combinations of the 1s orbitals on hydrogen. The resulting "three-over-one" bonding scheme is consistent with photoelectron spectroscopic measurements.
At room temperature and standard pressure, methane is a colorless, odorless gas.[4] The familiar smell of natural gas as used in homes is a safety measure achieved by the addition of an odorant, often methanethiol or ethanethiol. Methane has a boiling point of −**1 °C (−**7.8 °F) at a pressure of one atmosphere.[5] As a gas it is flammable only over a narrow range of concentrations (5–*5%) in air. Liquid methane does not burn unless subjected to high pressure (normally 4–5 atmospheres).[6]
| Pays: | China |
| N ° de modèle: | methane |
| Prix FOB: | Obtenir le dernier prix |
| Localité: | - |
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| Payment Type: | T/T, L/C |
| Groupe de produits : | - |
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