5-bromo-2,2-dimethylcyclopentan-1-one

China [CN]

Chinese Name: 5-Bromo-2,2-dimethylcyclopentan-1-one

English Name: 5-bromo-2,2-dimethylcyclopentan-1-one

Molecular Formula: C₇H₁₁BrO

Molecular Weight: 191.06 (Calculated: C 43.99%, H 5.80%, Br 41.81%, O 8.37%)

II. Chemical Structure and Characteristics

Structural Analysis: The molecule is based on a cyclopentanone nucleus (a five-membered ring containing a keto group), with two methyl (-CH₃) substitutions at the 2-position (forming a quaternary carbon center), and a bromine atom (-Br) attached to the 5-position.

Core Characteristics:

The 2,2-dimethyl substitution increases the steric hindrance of the cyclopentane ring, limiting its flexibility and enhancing its structural stability.

The keto group (C=O) at the 1-position is a highly polar group and can act as an electrophilic center in the reaction.

The bromine atom (-Br) at the 5-position has a high leaving ability and is an important nucleophilic substitution reaction site.