Diamine
A diamine is an amine with exactly two amino groups. Diamines are used as monomers to prepare polyamides, polyimides, and polyureas. The term diamine refers mostly to primary diamines, as those are the most reactive.
In terms of quantities produced, 1,6-diaminohexane is most important, followed by ethylenediamine. Vicinal diamines are a structural motif in many biological compounds and are used as ligands in coordination chemistry.Linear
Derivatives of ethylenediamine are prominent:
Xylylenediamines are classified as alkylamines since the amine is not directly attached to an aromatic ring.
- o-xylylenediamine or OXD
- m-xylylenediamine or MXD
- p-xylylenediamine or PXD
Aromatic diamines
Three phenylenediamines are known:
Various N-methylated derivatives of the phenylenediamines are known:
Examples with two aromatic rings include derivatives of biphenyl and naphthalene:
