| Identification | Back Directory | [Name]
BENZENESULFONIC ANHYDRIDE | [CAS]
512-35-6 | [Synonyms]
BENZENESULFONIC ANHYDRIDE
Bis(benzenesulfonic)anhydride
Benzenesulfonic Anhydride >
Benzenesulfonic acid anhydride
Benzenesulfonic acid, 1,1'-anhydride | [Molecular Formula]
C12H10O5S2 | [MDL Number]
MFCD00054601 | [MOL File]
512-35-6.mol | [Molecular Weight]
298.33 |
| Chemical Properties | Back Directory | [Melting point ]
60-85° (softens about 55°); mp 88-91° (softens about 75°) | [Boiling point ]
463.7±28.0 °C(Predicted) | [density ]
1.439±0.06 g/cm3(Predicted) | [storage temp. ]
2-8°C, sealed storage, away from moisture | [form ]
powder to crystal | [color ]
White to Light yellow to Light orange | [Merck ]
14,1071 | [InChI]
InChI=1S/C12H10O5S2/c13-18(14,11-7-3-1-4-8-11)17-19(15,16)12-9-5-2-6-10-12/h1-10H | [InChIKey]
MLWPJXZKQOPTKZ-UHFFFAOYSA-N | [SMILES]
S(=O)(=O)(OS(=O)(=O)C1=CC=CC=C1)C1=CC=CC=C1 |
| Hazard Information | Back Directory | [Uses]
In Friedel-Crafts sulfone synthesis; in other sulfonylation reactions. | [Preparation]
Benzenesulfonic anhydride is prepared on a large scale by heating benzenesulfonic acid with excess phosphorus pentoxide mixed with an inert support. An inert support of 1:1 Supercel kieselguhr and Gooch asbestos was mixed with phosphorus pentoxide and slowly added to benzenesulfonic acid, first at rt then heating to 100 °C. The resultant mixture was heated at 100 °C for 5 h, 1,2-dichloroethane was added, and the solution was refluxed for 10 min. After cooling and successive filtrations, benzenesulfonic anhydride was recovered in 70% yield. | [storage]
The reagent can be stored at rt for extended periods under anhydrous conditions. Liquefication occurs upon exposure to air for 2.5 h. Explosive when mixed with 90-95% H2O2. | [Purification Methods]
Crystallise the anhydride from Et2O (m 88.5-91.5o), CHCl3 or chlorobenzene (m 90-92o). Store it dry. [Field J Am Chem Soc 74 394 1952, Beilstein 11 H 3, 11 I 11, 11 II 23, 11 III 50, 11 IV 50.] |
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| Company Name: |
J & K SCIENTIFIC LTD.
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| Telephone: |
18210857532 18210857532 |
| Website: |
https://www.jkchemical.com |
| Company Name: |
Shaanxi Dideu Medichem Co. Ltd
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| Telephone: |
+86-29-87569266 +86-17392581500 |
| Website: |
https://www.chemicalbook.com/manufacturer/shaanxi-dideu-medichem-220/ |
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