Phosphorus tribromide → Phosphorus trichloride

HRID 1660331Notes

Reaction equation

HRID 1660331 reaction equation
[P:1]([Cl:5])([Cl:4])([Cl:3])=[O:2].P(Br)(Br)Br.[P:10]([Cl:15])([Cl:14])([Cl:13])([Cl:12])[Cl:11]>>[P:1]([Cl:5])([Cl:4])([Cl:3])=[O:2].[P:10]([Cl:13])([Cl:12])[Cl:11].[P:10]([Cl:15])([Cl:14])([Cl:13])([Cl:12])[Cl:11]

Participants

6

Reactant 3

HCID 24614Phosphorus tribromide2×HCID 24813Phosphorus oxychloride2×HCID 24819Phosphorus pentachloride

Product 3

HCID 24387Phosphorus trichlorideHCID 24813Phosphorus oxychlorideHCID 24819Phosphorus pentachloride

Procedure

A number of dehydrating agents can be used, for example, phosphorus oxychloride, phosphorus tribromide, phosphorus pentachloride and polyphosphoric acid. Phosphorus oxychloride and phosphorus tribromide are the preferred agents. Furthermore, a particular dehydrating agent determines which compound of formula I will be formed: use of phosphorus oxychloride, phosphorus trichloride or phosphorus pentachloride affords the corresponding compound of formula I in which R5 is chloro; use of phosphorus oxybromide or phosphorus tribromide affords the corresponding compound of formula I in which R5 is bromo; and use of polyphosphoric acid affords the corresponding compound of formula I in which R5 is hydroxy.

Workup

  1. customwill be formed

Sources & evidence

ORD record
ord-7e355996d5ce44b1a4bbc521f2c8a182
Source dataset
uspto-grants-1981_12
Patent number
US04307234

Reaction notes

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