Quaternary (chemistry)
Quaternary is a term used in organic chemistry to classify various types of compounds (e. g. amines and ammonium salts).[1]
| Red highlighted central atoms in various groups of chemical compounds. Quaternary central atoms compared with primary, secondary and tertiary central atoms. | ||||
| primary | secondary | tertiary | quaternary | |
| Carbon atom in an alkane |
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| Alcohol |
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does not exist |
| Amine |
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| Amide |
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does not exist |
| Phosphine |
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