Halogenoalkanes key terms

polar carbon-halogen bond

A bond between carbon and a halogen that has a partial positive charge on carbon and a partial negative charge on the halogen due to differences in electronegativity.

nucleophilic substitution

A chemical reaction where a nucleophile replaces a leaving group in a molecule, often involving polar bonds such as those in halogenoalkanes.

Nucleophilic substitution

A reaction mechanism where a nucleophile replaces a leaving group in a molecule.

Hydroxide ion (OH-)

A negatively charged ion that acts as a nucleophile in nucleophilic substitution reactions.

carbon-halogen bond enthalpy

The energy required to break the carbon-halogen bond, influencing the rate of nucleophilic substitution reactions.

reaction rate

The speed at which a chemical reaction occurs, affected by factors such as bond enthalpy and the nature of reactants.

hydrolysis

A chemical reaction involving the breaking of a bond in a molecule using water. In Nucleophilic substitution, hydrolysis is used to explain use test-tube hydrolysis evidence to compare reaction rates with A-Level Chemistry precision.

reaction rate

The speed at which reactants are converted into products in a chemical reaction. In Nucleophilic substitution, reaction rate is used to explain use test-tube hydrolysis evidence to compare reaction rates with A-Level Chemistry precision.

hydroxide ion

A negatively charged ion (OH-) that acts as a nucleophile in nucleophilic substitution and as a base in elimination reactions.

nucleophile

A species that donates an electron pair to form a chemical bond in a reaction, often attacking electrophilic centers.

halogenoalkanes

Organic compounds containing carbon, hydrogen, and halogen atoms, characterized by polar carbon-halogen bonds.

nucleophilic substitution

A reaction mechanism where a nucleophile replaces a leaving group in a molecule, often involving halogenoalkanes.

Nucleophilic substitution

A reaction where a nucleophile replaces a leaving group in a molecule, typically involving halogenoalkanes.

Elimination

A reaction that removes a small molecule from a larger one, resulting in the formation of a double bond, often involving halogenoalkanes.

ozone layer

A region of Earth's stratosphere that absorbs most of the Sun's harmful ultraviolet radiation.

ultraviolet radiation

A type of electromagnetic radiation that can cause skin damage and increase the risk of skin cancer.

Chlorofluorocarbons (CFCs)

Chemical compounds containing chlorine, fluorine, and carbon, known for their role in ozone depletion.

Chlorine radicals

Highly reactive species formed when CFCs break down, contributing to ozone layer depletion.

chlorine radical

A highly reactive species formed from the breakdown of chlorofluorocarbons (CFCs) that catalyzes the decomposition of ozone (O3) in the atmosphere.

ozone decomposition

The process by which ozone (O3) is broken down into oxygen (O2) molecules, often catalyzed by chlorine radicals, leading to depletion of the ozone layer.

CFCs

Chlorofluorocarbons (CFCs) are synthetic compounds that contain carbon, chlorine, and fluorine, known for their role in ozone depletion.

ozone depletion

Ozone depletion refers to the reduction of the ozone layer in the Earth's stratosphere, primarily caused by the release of chlorine radicals from CFCs.