Ch_322a_2.07

Ch_322a_2.07 - CH 2 H 2 C CH 2 H 2 C CH 2 N H N H...

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Amines Amines have a structural unit that can be viewed as a derivative of ammonia where R groups replace H. Up to all three H can be replaced. The classification system of amines is based on the number of H replaced by alkyl or aryl groups . N : H H H ammonia N H H R a primary amine N H R R' a secondary amine N R R' R'' a tertiary amine Note: The designation of 1 o , 2 o and 3 o amine does not depend in any way on the structure of the R group.
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Classifications and Names of Amines Simple amines are named using the alkyl group name followed by "amine." When more than one R group is present, the prefixes "di" and "tri" are included. If there are R and R' groups, the alkyl groups are named in alphabetical order. CH 3 CH 2 NH 2 ethylamine (a 1 o amine) CH 3 CHCH 3 NH 2 isopropylamine (a 1 o amine) CH 3 CCH 3 NH 2 CH 3 tertiary-butylamine (a 1 o amine) CH 3 CH 2 NCH 2 CH 3 CH 2 CH 3 triethylamine (a 3 o amine)
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Unformatted text preview: CH 2 H 2 C CH 2 H 2 C CH 2 N H N H piperidine (a 2 o amine) (CH 3 ) 2 CHNHCH(CH 3 ) 2 diisopropylamine (a 2 o amine) (CH 3 CH 2 ) 2 NCH 3 diethylmethylamine (a 3 o amine) The Structure and Base Property of Amines Amines have a trigonal pyramidal structure similar to ammonia. VSEPR theory predicts a tetrahedral geometry. N H H H : 107 ammonia N CH 3 108.7 o CH 3 CH 3 trimethylamine o Amines are bases. (CH 3 ) 3 N base + HCl acid salt N CH 3 CH 3 CH 3 H + Cl-Quiz 2.07 Identify the following amines as primary, secondary or tertiary types, and give their alkyl group names. (CH 3 ) 2 NH (CH 3 ) 3 CN(CH 3 ) 2 CH 3 CH 2 CH 2 CH 2 NH 2 (a 2 o amine) dimethylamine (a 3 o amine) tert-butyldimethylamine (a 1 o amine) butylamine...
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This note was uploaded on 07/22/2009 for the course CHEM 322AL taught by Professor Jung during the Summer '07 term at USC.

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Ch_322a_2.07 - CH 2 H 2 C CH 2 H 2 C CH 2 N H N H...

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