-in

The ending -idin is part of the name of numerous individual compounds and groups of substances in chemistry . In most cases, these are aromatic compounds that contain nitrogen . However, the naming does not follow a consistent system.

Derivatives of aromatic parent compounds


Anisole	o- anisidine

Numerous aromatic compounds derive their name from a parent compound. An amino group is introduced here as an additional substituent . Usually the ending -ol is separated and the ending -idin is added.

This is how:

from toluene the Tolu idin
of anisole (methoxybenzene), the anise idin ,
from phenetole (ethoxybenzene) the Phenet idin
from xylene the Xyl idin
from cumene (isopropylbenzene) the Cum idin
from mesitylene the Mes idin
from pseudocumene the pseudocum idin
of cresol the Kres idin

Phenol and benzene do not follow this system.

Of phenol can be according to their names Phen idin form. This name would then have to be used for the aminophenol . However, the name phenidine is used as another common name for phenacetin .

The name benzidine can accordingly be formed from benzene . This name would then have to be used for the aminobenzene (= aniline ). However, the name benzidine is used for 4,4'-diaminobiphenyl .

Nitrogen-containing heterocyclic compounds


Pyrrole	Pyrrolidine


Oxazole	Oxazolidine


Thiazole	Thiazolidine

Numerous nitrogen-containing heterocyclic compounds also contain the ending -idin such. B. pyridine , pyrimidine , lutidine , collidine , etc. Piperidine is a saturated heterocycle.

According to the Hantzsch-Widman system , this ending is part of the ending of nitrogen-containing, saturated rings with a ring size of three, four and five atoms. The endings -iridine (for three rings), -etidine (for four rings) and -olidine (for five rings) are used for these.

Nucleosides

The trivial ending -idin indicates that the nucleosides in question contain pyrimidine bases as a structural element, e.g. B .:

Compounds without nitrogen

There are, however, substances that end in -idin that do not contain nitrogen, e.g. B. hesperidin .

Individual evidence

↑ Philipp Fresenius and Klaus Görlitzer: Organic-chemical nomenclature , 3rd edition, Wissenschaftliche Verlagsgesellschaft, Stuttgart 1991, ISBN 3-8047-1167-7 , p. 295.

Web links

Search for idin in the IUPAC Gold Book .

[Fresenius-1] Philipp Fresenius and Klaus Görlitzer: Organic-chemical nomenclature , 3rd edition, Wissenschaftliche Verlagsgesellschaft, Stuttgart 1991, ISBN 3-8047-1167-7 , p. 295.