Phosphorus pentoxide is a deliquescent compound prepared by reacting phosphorus with air. It is a commonly used as dehydrating and condensing agent in organic synthesis.
Synonyms: Phosphoric anhydride; Phosphorus(V) oxide
Molecular Formula: O5P2
Molecular Weight: 141.94
Linear Structural Formula: P2O5
Purity: 99%
Melting Point: 340 C (lit.)
Density: 2.3 g/mL at 25 C (lit.)
Application: Phosphorus pentoxide/methanesulfonic acid (PPMA) may be used as a condensing agent and solvent for the synthesis of:
•High molecular weight poly(benzoxazole)s via direct polycondensation of aromatic dicarboxylic acids containing phenyl ether structure with 3,3'-dihydroxybenzidine dihydrochloride.
•Aromatic poly(phenylene ether ether ketone)s via direct self-polycondensation of 4-(4'-phenoxyphenoxy)benzoic acids.
•1,3-1H-dibenzimidazole-benzene by the reaction of isophthalic acid with 1,2-diaminobenzene.
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