Tertiary

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

This page is about general bonding patterns. For full three-dimensional structure of proteins and nucleic acids, see tertiary structure.

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 |  |  |  |

## See also

* Primary
* Secondary
* Quaternary

## References

* v
* t
* e

Stereochemistry

Topics|

* Chirality
* Racemic mixture

Configuration descriptors|

| cis–trans isomerism|

cis-, trans-

|

E-Z notation|

(E)-, (Z)-

Arene substitution pattern|

o-, m-, p\- (ortho, meta, para)

Endo-exo isomerism|

endo, exo

Syn and anti addition|

syn, anti

Three identical ligands|

fac, mer (facies, meridonal) [obsolete]

In carbon skeletons|

n, iso, neo, cyclo

Secondary and tertiary|

sec-, tert-

Spiro compound|

spiro

Catenane|

catena

Absolute configurations|

| CIP (Cahn–Ingold–Prelog) priority rules|

(R), (S)

|

Pseudoasymmetric (pseudochiral) centers|

(r), (s)

Optical rotation|

(+)-, (−)- or d-, l-

Relative configuration|

D-, L-

Octahedral propeller twist|

Λ-, Δ-

Category:Stereochemistry

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