Lithium diphenylphosphide
Chemical compound
From Wikipedia, the free encyclopedia
Lithium diphenylphosphide contains lithium and the organophosphorus anion with the formula (C6H5)2PLi. It is a red, air-sensitive solid that is used in the preparation of diphenylphosphino compounds.
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| Names | |
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| Preferred IUPAC name
Lithium diphenylphosphanide | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| C12H10LiP | |
| Molar mass | 192.13 g·mol−1 |
| Appearance | pale yellow solid |
| Reacts with water | |
| Solubility | Ethers, hydrocarbons |
| Hazards | |
| GHS labelling: | |
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| Danger | |
| H302, H312, H314, H332, H410 | |
| P260, P264, P270, P271, P273, P280, P301+P312, P301+P330+P331, P302+P352, P303+P361+P353, P304+P312, P304+P340, P305+P351+P338, P310, P312, P321, P322, P330, P363, P391, P405, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Synthesis and reactions
The lithium, sodium, and potassium salts are prepared by reduction of chlorodiphenylphosphine,[1] triphenylphosphine,[2][3] or tetraphenyldiphosphine with alkali metals (M):
- (C6H5)2PCl + 2 M → (C6H5)2PM + MCl
- (C6H5)3P + 2 M → (C6H5)2PM + MC6H5
- (C6H5)4P2 + 2 M → 2 (C6H5)2PM
They can also be obtained by deprotonation of diphenylphosphine.
With water, the salts convert to diphenylphosphine:[3]
- (C6H5)2PLi + H2O → (C6H5)2PH + LiOH
With halocarbons, the salts react to give tertiary phosphines:[4]
- (C6H5)2PM + RX → (C6H5)2PR + MX
When treated with metal halides, lithium diphenylphosphide gives transition metal phosphido complexes.
Structure and physical properties
Related compounds
- Sodium diphenylphosphide (CAS RN 4376-01-6)
- Potassium diphenylphosphide (CAS RN 15475-27-1)