Tertiary (chemistry)
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Tertiary is a term used in organic chemistry to classify various types of compounds (e. g. alcohols, alkyl halides, amines) or reactive intermediates (e. g. alkyl radicals, carbocations).
| Red highlighted central atoms in various groups of chemical compounds. Tertiary central atoms compared with primary, secondary and quaternary central atoms. | ||||
| primary | secondary | tertiary | quaternary | |
| Carbon atom in an alkane |  |  |  |  |
| Alcohol |  |  |  | does not exist |
| Amine |  |  |  |  |
| Amide |  |  |  | does not exist |
| Phosphine |  |  |  |  |