Methylidyne radical
Methylidyne, or (unsubstituted) carbyne, is an organic compound whose molecule consists of a single hydrogen atom bonded to a carbon atom. It is the parent compound of the carbynes, which can be seen as obtained from it by substitution of other functional groups for the hydrogen.
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| Names | |||
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| Preferred IUPAC name
Methylidyne | |||
| Systematic IUPAC name
Hydridocarbon hydridocarbon(•), Hydridocarbon(3•) | |||
| Identifiers | |||
3D model (JSmol) |
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| 7801830 | |||
| ChEBI | |||
| 24689 | |||
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| Properties | |||
| CH, CH•, CH3• | |||
| Molar mass | 13.0186 g mol−1 | ||
| Appearance | Colourless gas | ||
| Reacts | |||
| Thermochemistry | |||
Std molar entropy (S⦵298) |
183.04 J K−1 mol−1 | ||
Std enthalpy of formation (ΔfH⦵298) |
594.13 kJ mol−1 | ||
| Related compounds | |||
Related compounds |
Methyl (CH3) Methylene (CH2) Carbide (C) | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |||
The carbon atom is left with either one or three unpaired electrons (unsatisfied valence bonds), depending on the molecule's excitation state; making it a radical. Accordingly, the chemical formula can be CH• or CH3• (also written as ⫶CH); each dot representing an unpaired electron. The corresponding systematic names are methylylidene or hydridocarbon(•), and methanetriyl or hydridocarbon(3•). However, the formula is often written simply as CH.
Methylidyne is a highly reactive gas, that is quickly destroyed in ordinary conditions but is abundant in the interstellar medium (and was one of the first molecules to be detected there).