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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

Perfluorobutanesulfonyl fluoride | CAS 375-72-4

A nonaflation reagent for converting suitable alcohols and phenols into nonaflate esters, with reactive sulfonyl-fluoride content and moisture-related impurities central to sourcing.

CAS375-72-4
Molecular formulaC4F10O2S
Molecular weight302.09 g/mol

Product overview

Perfluorobutanesulfonyl fluoride combines a perfluorobutyl chain with a reactive sulfonyl fluoride group. Its alternative name, nonafluorobutanesulfonyl fluoride, counts the nine fluorines on the carbon chain; the tenth is bonded to sulfur. The sulfonyl fluoride, corresponding sulfonic acid and nonaflate salts are different purchasing identities. Qualification should therefore establish intact reagent content rather than relying on a broad fluorinated-material description.

Chemical identity

Chemical name
Perfluorobutanesulfonyl fluoride
CAS number
375-72-4
Molecular formula
C4F10O2S
Molecular weight
302.09 g/mol

Application context

NfF is used to prepare nonafluorobutanesulfonate esters from suitable alcohols and phenols. The resulting nonaflates can act as electrophilic partners in palladium-catalyzed cross-coupling and amination chemistry. Its supply-chain role is thus installation of an activating group on a selected substrate. Buyers should connect assay and hydrolysis-related impurity limits to that functionalization stage and confirm that the proposed analytical methods distinguish the active reagent from its acid-derived species.

Chemistry and synthetic role

The S–F bond belongs to the sulfonyl group, whereas the C–F bonds belong to the perfluoroalkyl chain. These are chemically distinct parts of the molecule.

Quality review

Reagent versus acid

Verify the sulfonyl fluoride form and use an assay specific to intact NfF.

Hydrolysis-related content

Agree controls for water, acidic species and free fluoride where relevant to the reaction.

Fluorinated related species

Review chromatographic or fluorine-NMR identity data capable of distinguishing related fluorinated compounds.

Preparing a specification

Specify C4F9SO2F identity, active assay, water or hydrolysis-product limits and the required fluorinated-impurity profile.

Packaging and storage

Confirm container compatibility, closure and net weight for the selected grade and destination. Follow the actual supplier SDS and batch label for storage and transport.

Documentation

Request the batch COA, SDS and analytical methods covering the agreed purchasing specification. Confirm which supporting chromatograms and application-specific records are available from the selected manufacturer.

Procurement questions

Why does the name say nonafluoro but the formula contain ten fluorines?

Nine are on the carbon chain and one is bonded to sulfur.

Is NfF a nonaflate salt?

No. It is the sulfonyl fluoride reagent used to prepare nonaflate derivatives.

Does the reagent itself serve as the coupling substrate?

Usually the nonaflate prepared from the selected alcohol or phenol is the downstream electrophile.

Technical sources
  1. PubChem CAS identity lookupNCBI / PubChem
  2. Perfluoro-1-butanesulfonyl fluorideSigma-Aldrich
  3. Nonafluoro-1-butanesulfonyl FluorideTCI