n.
A univalent radical, PH4, derived from phosphine.
[PHOSPH(O)- + (AMM)ONIUM.]
phosphonium
Dictionary:
phos·pho·ni·um (fŏs-fō'nē-əm) 
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In chemistry, the phosphonium cation is a positively charged polyatomic ion with the chemical formula PH4+, resulting from protonation of phosphine. It has a molar mass of 35.01 g/mol.
Salts containing alkyl or aryl groups attached to a positive phosphorus are referred to as phosphonium salts. Alkyltriphenylphosphonium salts are widely used for the preparation of Wittig reagents for the Wittig reaction.
See also
- Ammonium (NH4+)
- Hydronium (H3O+)
- Onium compounds
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 | phosphonium ion |
| alendronate |
| phosphine |
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 | Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved. Read more |
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