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Organic Definitions
*Chemistry Definitions* As Level
Term | Definition |
---|---|
Homologous Series | A series of compounds with the same functional group, the same general formula, and where one member differs from the next by CH2 |
Empirical Formula | Shows the simplest whole number ratio of the atoms present in one molecule |
Molecular Formula | Shows the actual number of atoms present in one moleculae |
Structural Formula | Shows each atom in the molecule seperately and how it is bonded. A more condenced way is to show the groupings around each carbon atom. |
Isomers | Two or more compounds with the same molecular formula. |
Homolytic Fission | When a bond breaks and one electron goes to each atom |
Heterolytic Fission | When a bond breaks and both electrons go to the same atom. |
Substitution | A reaction in which an atom or group of atoms are replaced by another atom or groups of atoms. |
Addition | A reaction in which two molecules react together to form a single product. |
Elimination | A reaction in which elements of a simple molecule such as HBr are removed without being replaced by an atom or groups of atoms |
Hydrolysis | A reaction in which water splits an orgainc into two components. |
Free Radical | A species with a single unpaired electron |
Nucleophile | A species which seeks out positive centres, and must have a lone pair of electrons ehich it donates to form a new dative covalent bond. |
Electrophile | A species which seeks out negative centres, and accepts a lone pair of electrons to form a new dative covalent bond. |
Number of moles in relation to concentration | Moles = Concentration / Volume (dm3) |