Primary

Short description: Term in organic chemistry used to describe degree of substitution of an atom in a molecule

Primary 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.

Primary central atoms compared with secondary, tertiary and quaternary central atoms.

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| primary | secondary | tertiary | quaternary
Carbon atom in an alkane |  |  |  |
Alcohol |  |  |  | does not exist
Amine |  |  |  |
Amide |  |  |  | does not exist
Phosphine |  |  |  |

## See also

* Secondary
* Tertiary
* Quaternary

## References

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