HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 374236Generated: October 27, 2026
Hydrogen Bromide → biphenyl-4,4'-diylbis(phosphonic acid)
https://huagongshe.com/reaction/374236
Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | Hydrogen Bromide | HCID 260 | — |
| Reactant | Water | HCID 962 | — |
| Reactant | P,P,P′,P′-Tetraethyl P,P′-[1,1′-biphenyl]-4,4′-diylbis[phosphonate] | HCID 53908436 | — |
| Solvent | Acetic Acid | HCID 176 | — |
| Product | biphenyl-4,4'-diylbis(phosphonic acid) | HCID 279154 | 66% |
Reaction Steps
66 ml of HBr at 33% by weight in acetic acid are added to 4.9 g (11.5 moles) of 4,4'-biphenyl-diphosphonic acid tetra-ethyl ester and the mixture is heated at 80° C. for 4 hours. After cooling to ambient temperature, 150 ml of H2O are added under agitation and the precipitate obtained is filtered, washed with water and vacuum dried (20 mm Hg) at 45° C. for one night. 2.29 g of 4,4'-biphenyl-diphosphonic acid, with a molar yield of 66% are obtained.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
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| Patent number | US05166380 |
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| Source dataset | uspto-grants-1992_11 |
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| ORD ID | ord-5e4f3f0dcfd24ea190ce2ec9da9b0d5c |
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| Source note | uspto-grants-1992_11 |
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