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• Fire retardant
  ...ded into several categories, such as [[mineral]], [[tetrakis(hydroxymethyl)phosphonium salts]], and [[organophosphorus]] compounds. Fire retardants are commonly u === Tetrakis(hydroxymethyl)phosphonium Salts ===
  2 KB (284 words) - 04:35, 23 February 2024
• 1,2-Wittig rearrangement
  ...ent to an [[ether]] into a [[carbonyl compound]] through the action of a [[phosphonium ylide]]. This reaction is named after the German chemist [[Georg Wittig]], ...key steps. Initially, a phosphonium ylide is formed by the reaction of a [[phosphonium salt]] with a strong [[base]]. This ylide then reacts with an alkoxide adja
  2 KB (276 words) - 03:35, 24 April 2024
• Wittig reaction
  ...ed chemical reaction that involves the synthesis of alkenes (olefins) from phosphonium ylides and aldehydes or ketones. It was discovered by German chemist Georg ...y steps. Initially, a phosphonium ylide is generated by deprotonation of a phosphonium salt, which is then reacted with an aldehyde or ketone to form a betaine in
  3 KB (384 words) - 02:32, 22 March 2024
• Corey–Fuchs reaction
  ...an aldehyde is converted into a dibromide compound through the action of a phosphonium ylide, which is generated from triphenylphosphine (Ph3P) and carbon tetrabr 1. Formation of the phosphonium ylide from triphenylphosphine and carbon tetrabromide.
  2 KB (313 words) - 09:44, 19 March 2024
• Onium ion
  ...nation of a [[phosphine]]. Phosphonium ions are used in the synthesis of [[phosphonium salts]], which are employed as [[catalysts]] and in organic synthesis.
  3 KB (396 words) - 06:11, 22 March 2024
• Phase-transfer catalyst
  ...ere the reaction takes place. The catalyst, often a quaternary ammonium or phosphonium salt, forms a complex with the reactant ion (usually an anion) in the aqueo * '''Quaternary Phosphonium Salts:''' Similar to quaternary ammonium salts but can be more thermally st
  3 KB (461 words) - 03:30, 22 March 2024
• Fernandez reaction
  ...intermediate. This intermediate then undergoes a rearrangement to form a [[phosphonium salt]], which is then deprotonated to form the final alkene product.
  1 KB (201 words) - 02:46, 22 February 2024
• Polyene
  ...mmon method is the [[Wittig reaction]], which involves the reaction of a [[phosphonium ylide]] with a [[carbonyl compound]] to form a polyene.
  2 KB (224 words) - 21:39, 25 February 2024
• Triphenylphosphine
  ...[[Mizoroki-Heck reaction]]. Additionally, it is used in the synthesis of [[phosphonium salts]], which are intermediates in the [[Wittig reaction]] for the formati
  2 KB (262 words) - 02:39, 22 March 2024
• Methoxymethylenetriphenylphosphorane
  ...compound with the formula C_19H_17O_2P, often abbreviated as MMTP. It is a phosphonium salt, specifically a Wittig reagent, used primarily in organic chemistry fo
  2 KB (267 words) - 09:04, 19 March 2024
• Lawesson's reagent
  The mechanism of the reaction involves the formation of a phosphonium ylide intermediate, which then reacts with the carbonyl compound to effect
  2 KB (327 words) - 03:16, 25 March 2024
• Horner–Wadsworth–Emmons reaction
  ...luding the use of less toxic and more stable phosphonate esters instead of phosphonium ylides. Additionally, the HWE reaction typically provides better control ov
  2 KB (359 words) - 10:01, 19 March 2024
• Michaelis–Arbuzov reaction
  ...phite attacks the electrophilic carbon atom in the alkyl halide, forming a phosphonium intermediate.
  3 KB (353 words) - 05:55, 19 March 2024
• Benzylidene compounds
  ...ence of a base. Another method is through the [[Wittig reaction]], where a phosphonium ylide reacts with an aldehyde or ketone to form a benzylidene compound.
  3 KB (403 words) - 20:10, 17 March 2024
• Phase transfer catalysis
  The most common type of phase transfer catalyst is a quaternary ammonium or phosphonium salt. These catalysts are soluble in both organic and aqueous phases and ca
  3 KB (457 words) - 02:56, 28 March 2024
• Enones
  ...with ketones in the presence of a base, and the [[Wittig reaction]], where phosphonium ylides are used to convert carbonyl groups into alkenes.
  3 KB (397 words) - 16:41, 23 March 2024
• Stilbene
  ...cal reactions, one of the most common being the Wittig reaction, where a [[phosphonium ylide]] reacts with an aldehyde or ketone to form a double bond, yielding '
  3 KB (361 words) - 10:54, 22 March 2024
• Phosphorane
  ...s attached to the phosphorus atom. For instance, in the Wittig reaction, a phosphonium ylide (a type of phosphorane where one of the substituents is a carbanion)
  3 KB (429 words) - 01:09, 22 March 2024
• Ylide
  ...de. For example, phosphorus ylides are typically synthesized by treating a phosphonium salt with a strong base.
  3 KB (433 words) - 14:02, 22 March 2024
• Name reaction
  ...ion that allows the synthesis of alkenes from aldehydes or ketones using a phosphonium ylide.
  3 KB (468 words) - 13:19, 21 March 2024

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