NH2 Z-ethyipentanamide 3-brom0-2-et CH3 o N-methyl5-bromo-2- In the first example, the parent chain is a pentane and the acy l group is assigned as carbon #1. On the pentane parent, there is an ethy l group in position #2 hence the name, 2-ethy pentanamide In the second example, there are two potential four-carbon chains; in this case, the chain with the most substituents is selected as parent,(a butane). Attached to the chain at carbon #2 is an ethyl group and at carbon #3, a bromine; hence the name 3-bromo-2-ethy butanamide In the third example, the acyl group is attached to a cycloalkene ring and will therefore be named as carboxamide"substituent (rule #4). The parent ring is a cyclohexene; letting the acyl group be carbon #1, the name is 2-cyclohexenecarboxamid In the last example, the name is based on benzoic acid as the parent and the nitrogen has a methyl substituent. In this case, we simply number the substituents to give the lowest number sequence at the first point of difference and arrange alphabetically: N-methy 1-5-bromo-2-methy lbenzamide Simple carboxylate esters are named as derivatives of the carboxylic acid, by changing the suffix -oic acid to -oate, and naming the alcohol portion first. Select the longest continuous carbon chain, conta ining the acyl group, and derive the parent name by replacing the-e ending with -oate, then a ppend the the alcohol to the front of the name 2. Num ber the carbon chain, beginning at the end nearest to the acyl group. 3. Number the substituents and write the name, listing substituents alpha betically 4. Acid halide substituents attached to rings are named using the suffix -carboxylate Several simple examples are shown belowIn the first example, the parent chain is a pentane and the acyl group is assigned as carbon #1. On the pentane parent, there is an ethyl group in position #2; hence the name, 2-ethylpentanamide. In the second example, there are two potential four-carbon chains; in this case, the chain with the most substituents is selected as parent, (a butane). Attached to the chain at carbon #2 is an ethyl group and at carbon #3, a bromine; hence the name 3-bromo-2-ethylbutanamide. In the third example, the acyl group is attached to a cycloalkene ring and will therefore be named as a "carboxamide" substituent (rule #4). The parent ring is a cyclohexene ; letting the acyl group be carbon #1, the name is 2-cyclohexenecarboxamide. In the last example, the name is based on benzoic acid as the parent and the nitrogen has a methyl substituent. In this case, we simply number the substituents to give the lowest number sequence at the first point of difference and arrange alphabetically; N-methyl-5-bromo-2-methylbenzamide. Simple carboxylate esters are named as derivatives of the carboxylic acid, by changing the suffix -oic acid to -oate, and naming the alcohol portion first. 1. Select the longest continuous carbon chain, containing the acyl group, and derive the parent name by replacing the -e ending with -oate, then append the the alcohol to the front of the name. 2. Number the carbon chain, beginning at the end nearest to the acyl group. 3. Number the substituents and write the name, listing substituents alphabetically. 4. Acid halide substituents attached to rings are named using the suffix -carboxylate. Several simple examples are shown below: