secondary alkyl halide
Quick Summary
A secondary alkyl halide is a chemical compound where a halogen atom is bonded to a carbon atom that is itself directly bonded to two other carbon atoms. These compounds, represented as RX (where R is an alkyl group and X is a halogen like F, Cl, Br, or I), are polar due to the electronegativity difference between carbon and the halogen, creating a partial positive charge on the carbon and a partial negative charge on the halogen.1
Secondary alkyl halides are important in organic chemistry because they can be readily converted into other types of compounds through reactions like nucleophilic substitution, elimination, and the formation of organometallic compounds, such as Grignard reagents. Elimination reactions, in particular, are common when secondary alkyl halides react with strong bases, leading to the formation of alkenes. They can also be synthesized from alcohols by substituting the hydroxyl group with a halogen atom.234
Ask Britannica AI about this topic
Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.
organohalogen compoundStructure and physical propertiesā¦I) are classified as primary, secondary, or tertiary according to the degree of substitution at the carbon to which the halogen is attached. In a primary alkyl halide, the carbon that bears the halogen is directly bonded to one other carbon, in a secondary alkyl halide to two, and inā¦
Read Moreā¦I) are classified as primary, secondary, or tertiary according to the degree of substitution at the carbon to which the halogen is attached. In a primary alkyl halide, the carbon that bears the halogen is directly bonded to one other carbon, in a secondary alkyl halide to two, and inā¦
Read More- organohalogen compoundNucleophilic substitution
ā¦halides (RCH2X) react faster than secondary alkyl halides (RRā²CHX), which in turn react faster than tertiary alkyl halides (RRā²Rā³CX). When the substituents R, Rā², and Rā³ are smallāe.g., R = Rā² = Rā³ = H in CH3Xāthe transition state is not very crowded, and the nucleophile displaces the leaving groupā¦
Read Moreā¦halides (RCH2X) react faster than secondary alkyl halides (RRā²CHX), which in turn react faster than tertiary alkyl halides (RRā²Rā³CX). When the substituents R, Rā², and Rā³ are smallāe.g., R = Rā² = Rā³ = H in CH3Xāthe transition state is not very crowded, and the nucleophile displaces the leaving groupā¦
Read More