Dimethylphosphine is the organophosphorus compound with the formula (CH3)2PH, often written Me2PH. It is a malodorous gas that condenses to a colorless liquid just below room temperature. Although it can be produced by methylation of phosphine, a more practical synthesis involves the reduction of tetramethyldiphosphine disulfide with tributylphosphine:[1]
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Preferred IUPAC name
Dimethylphosphane | |
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Properties | |
(CH3)2PH | |
Molar mass | 62.052 g·mol−1 |
Appearance | Colorless gas or colorless liquid |
Odor | Malodorous |
Boiling point | 21.1 °C |
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Main hazards
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toxic |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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The compound exhibits the properties characteristic of a secondary phosphine, i.e., a compound of the type R2PH. It can be oxidized to the phosphinic acid:
It can be protonated to give the dimethylphosphonium ion:
With strong bases (e.g., lithium amide, it can be deprotonated to give dimethyl phosphide derivatives (e.g., lithium dimethyl phosphide):