Terms used in organic chemistry.

1. Alkane
2. Alkene
3. Alkyne
4. Aromatic
5. Functional group
6. Isomer
7. Stereoisomer
8. Chirality
9. Electrophile
10. Nucleophile
11. Substitution reaction
12. Addition reaction
13. Elimination reaction
14. Hydrogenation
15. Dehydrogenation
16. Oxidation
17. Reduction
18. Condensation reaction
19. Esterification
20. Polymerization

Acid
A compound that donates a proton (H+).

Aldehyde
A compound that contains a carbonyl group (C=O) bonded to a hydrogen atom and an alkyl or aryl group.

Alkene
A hydrocarbon that contains one or more carbon-carbon double bonds.

Alkyl group
A saturated hydrocarbon group derived from an alkane by removing a hydrogen atom.

Alkyl halide
A compound that contains a halogen atom (F, Cl, Br, or I) bonded to an alkyl group.

Alkyne
A hydrocarbon that contains one or more carbon-carbon triple bonds.

Amine
A compound that contains a nitrogen atom bonded to one or more alkyl or aryl groups.

Aromatic compound
A compound that contains a benzene ring or a similar ring structure.

Base
A compound that accepts a proton (H+).

Carbocation
A positively charged carbon atom.

Carbonyl group
A functional group that consists of a carbon atom double-bonded to an oxygen atom (C=O).

Carboxylic acid
A compound that contains a carboxyl group (-COOH).

Conjugated system
A system of alternating double and single bonds.

Cyclic compound
A compound that contains a ring of atoms.

Electrophile
A species that is attracted to electrons.

Ester
A compound that contains an ester group (-COOR).

Ether
A compound that contains an ether group (-C-O-C-).

Free radical
A species that contains an unpaired electron.

Functional group
An atom or group of atoms that gives a compound its characteristic chemical properties.

Glycol
A compound that contains two hydroxyl groups (-OH) on adjacent carbon atoms.

Halogen
An element from Group 17 of the periodic table (F, Cl, Br, I).

Heterocyclic compound
A cyclic compound that contains atoms other than carbon and hydrogen.

Hydrocarbon
A compound that contains only carbon and hydrogen atoms.

Hydroxyl group
A functional group that consists of a hydrogen atom bonded to an oxygen atom (-OH).

Imine
A compound that contains a carbon-nitrogen double bond (C=N).

Ketone
A compound that contains a carbonyl group (C=O) bonded to two alkyl or aryl groups.

Nitrile
A compound that contains a cyano group (-CN).

Nucleoside
A compound that consists of a purine or pyrimidine base bonded to a sugar molecule.

Nucleotide
A compound that consists of a nucleoside bonded to a phosphate group.

Olefin
An alkene.

Organic compound
A compound that contains carbon.

Peroxide
A compound that contains a peroxide group (-O-O-).

Phenol
A compound that contains a hydroxyl group (-OH) bonded to a benzene ring.

Polymer
A large molecule that is composed of repeating units.

Radical
A free radical.

Reagent
A substance that is used to bring about a chemical reaction.

Resonance
A phenomenon in which a molecule can be represented by two or more Lewis structures.

Saturated compound
A compound that contains only single bonds.

Stereoisomer
A compound that has the same molecular formula as another compound but has a different arrangement of atoms in space.

Sulfonic acid
A compound that contains a sulfonic acid group (-SO3H).

Thiol
A compound that contains a sulfhydryl group (-SH).

Unsaturated compound
A compound that contains one or more double or triple bonds.