As Chemistry Ocr 'organic Reagents And Their Reactions'

Front 1

Define 'homolytic fission'

Back 1

The breaking of a covalent bond, with one of the bonded electrons going to each atom, forming two radicals

Front 2

Define 'radical'

Back 2

A species with an unpaired electron. (A single dot is often written next to the species to represent the unpaired electron)

Front 3

Define 'heterolytic fission'

Back 3

The breaking of a covalent bond with both of the bonded electrons going to one of th atoms forming a cation and an anion

Front 4

Define 'nucleophile'

Back 4

An atom (or group of atoms) that is attracted to an electron-DEFICIENT centre or atom, where it DONATES a pair of electrons to form a new covalent bond

Front 5

Define 'electrophile'

Back 5

An atom (or group of atoms) that is attracted to an electron-RICH centre or atom, where it ACCEPTS a pair of electrons to form a new covalent bond

Front 6

Define 'addition reaction'

Back 6

A reaction in which a reactant is ADDED TO AN UNSATURATED MOLECULE to make a SATURATED MOLECULE

(2 --> 1)

Front 7

Define 'substitution reaction'

Back 7

A reaction in which an atom (or group of atoms) is replaced with a different atom (or group of atoms)

(1 --> 1)

Front 8

Define 'elimination reaction'

Back 8

Refers to the REMOVAL OF A MOLECULE from a SATURATED MOLECULE to make a UNSATURATED MOLECULE.

(1 --> 2)