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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

1,1-Bis(bromomethyl)cyclopropane | CAS 29086-41-7

A cyclopropane building block bearing two bromomethyl arms on the same ring carbon, offering a defined geminal architecture for exploring bifunctional small-ring synthesis.

CAS29086-41-7
Molecular formulaC5H8Br2
Molecular weight227.92 g/mol

Product overview

Two primary bromomethyl groups distinguish this cyclopropane derivative from compounds brominated directly on the ring. Both arms attach to carbon 1, creating a geminal substitution pattern rather than a 1,2-disubstituted cyclopropane. Its role in synthesis follows from this compact, bifunctional architecture. A checked Organic Syntheses preparation places the compound within electrochemical small-ring chemistry. For route evaluation, structural confirmation must establish both the ring and the two bromomethyl groups; total bromine content alone cannot identify their positions or rule out other brominated material.

Chemical identity

Chemical name
1,1-Bis(bromomethyl)cyclopropane
CAS number
29086-41-7
Molecular formula
C5H8Br2
Molecular weight
227.92 g/mol

Application context

The compound is documented in preparative small-ring chemistry and provides two primary bromide sites around a cyclopropane centre. These sites make it a candidate building block for routes designed around two substitutions or further ring construction. The chosen route determines whether both arms must react or whether a differentiated intermediate is required. Buyers evaluating this material should therefore consider the consequences of mono-functional impurities and related brominated species for stoichiometry and product distribution. Its catalogue role is a specialized synthetic building block, with application suitability established against the intended transformation.

Chemistry and synthetic role

The ring carries two CH2Br groups on one carbon. The bromine atoms are outside the three-membered ring, and the two arms have equivalent connectivity in the starting material.

Quality review

Confirm geminal substitution

Identity data should establish the 1,1 pattern and intact cyclopropane ring.

Assess bifunctional integrity

Check that assay and impurity methods distinguish material retaining both bromomethyl arms.

Separate brominated by-products

Review route-relevant organic bromide impurities by resolved chromatography.

Preparing a specification

Specify 1,1 connectivity, organic assay method and related brominated compounds. Add water and residual-solvent criteria where required by the planned transformation.

Packaging and storage

Packaging and net weight are agreed for the selected grade, order quantity and destination. Check the actual supplier SDS and label for storage and transport requirements.

Documentation

Request a batch COA, SDS and the analytical methods for the acceptance criteria below. Confirm which supporting chromatograms and identity data are available from the selected manufacturer.

Procurement questions

Is this a dibromocyclopropane?

The bromines are on two methyl side chains, not directly on the ring.

Why does mono-functional material matter?

It changes the available reactive-site balance in a two-site transformation.

Is elemental bromine content enough?

It cannot determine how bromine is distributed among different molecules.

Technical sources
  1. PubChem CID 11020629NCBI / PubChem
  2. 1,1-Bis(bromomethyl)cyclopropaneFUJIFILM Wako / Matrix Scientific
  3. Controlled-potential electrolytic reduction: 1,1-bis(bromomethyl)cyclopropaneOrganic Syntheses