Topic 19: Organic Nitrogen compounds: Amines, Amides, Amino Acids & Proteins

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11 Terms

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aliphatic amines

have at least 1 alkyl group bonded to the nitrogen

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aromatic amines

contain a benzene ring directly attached to the NH2 group, the delocalized ring

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SOLUBILITY

Shorter-chain amines are highly soluble due to hydrogen bonding with water.

Longer-chain amines have lower solubility as larger R groups disrupt hydrogen bonding.

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SHAPE

similar to pyramidal with a bond angle of 170ºC

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BASICITY

lone pair of the N makes amines basic

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dissolve in water

forms a weak alkaline solution

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react with acids

produce salts

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preparation of amide

acyl chloride + ammonia → amide + HCl

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amide + H2O

carboxylic acid + ammonia

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amide + H2O + HCl

carboxylic acid + ammonia salt

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amide + NaOH

carboxylic salt + NH3