2-thiophen potassium trifluoroborate

Description

2-thiophen potassium trifluoroborate is a potassium organotrifluoroborate – the tetracoordinate, air-stable counterpart of the corresponding boronic acid, built on a thiophene core.

The practical argument for a trifluoroborate is stoichiometric honesty. Boronic acids equilibrate with their cyclic anhydrides (boroxines) and carry variable water, so a weighed sample is of uncertain composition. The trifluoroborate is a defined crystalline salt: it weighs what it is, tolerates air and moisture on the bench, and releases the active boron species only under the hydrolytic conditions of the reaction itself.

Key data

• CAS number: 906674-55-3
• Molecular formula: C4H3BF3KS
• Molecular weight: 190.04 g/mol
• Category: Potassium Trifluoroborates

What the substitution pattern does

Thiophene is not simply a benzene ring with a sulphur atom. The ring is smaller, its internal angles differ, and sulphur contributes greater polarisability than any second-row substituent – so replacing a phenyl with a thienyl bends the molecular axis slightly while increasing refractive index.

Typical applications

• multi-step sequences in which the boron handle must survive earlier steps untouched
• reactions run in air, on the open bench, without glovebox handling
• automated and parallel synthesis, where accurate solid dispensing matters
• preparation of fluorinated biphenyls for display-grade liquid crystal blends
• Suzuki-Miyaura coupling where a weighable, non-hygroscopic boron source is required

Ordering

This compound is supplied to order. Pricing depends on quantity and on the specification you need, so it is quoted rather than listed – send an enquiry stating the quantity and any purity or analytical requirement, and you will receive a written quotation.

Please quote CAS 906674-55-3 when enquiring, so that the correct isomer is supplied.

Handling and documentation

Supplied for laboratory and industrial use by trained personnel only. Not for use as a medicine, food, cosmetic or biocide, and not for administration to humans or animals. Safety documentation is issued with the order; this page is not a source of hazard information.