Amidine

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Amidines are a class of oxoacid derivatives.

The oxoacid from which an amidine is derived must be of the form RnE(=O)OH, where R is a substituent. The −OH group is replaced by an −NH2 group and the =O group is replaced by =NR, giving amidines the general structure RnE(=NR)NR2.

The skeletal formula of acetamidine
The skeletal formula of acetamidine

When the parent oxoacid is a carboxylic acid, the resulting amidine is a carboxamidine, and has the following general structure:

The general structure of a carboxamidine

Carboxamidines are frequently referred to simply as amidines, as they are the most commonly-encountered type of amidine in organic chemistry. The simplest amidine is acetamidine, CH3C(=NH)NH2.

Examples of amidines include DBU and diminazene.

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