Quaternary

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

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 |  |  |  |
Alcohol |  |  |  | does not exist
Amine |  |  |  |
Amide |  |  |  | does not exist
Phosphine |  |  |  |

## See also

* Primary
* Secondary
* Tertiary

## References

1. ↑ Paula Yurkanis Bruice: Organic Chemistry, Pearson Education Inc., 2004, 4. Ed., p. 78, 104, 893, and 912, ISBN 0-13-121730-5.

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