3. Number the substituents and write the name, listing substituents alpha betically Several simple examples are shown below: benzoic anhydride phthalic anhydride In the first example, the parent chains are both pentane hence the name pentanoic anhydride (also as bis pentanoic anhydride) In the second example, there are two parent chains; ethanoic acid and butanoic acid; hence the name butanoic ethanoic anhydride(acetic can be used in place of ethanoic) In the third example, the name is based on benzoic acid as the parent, and the name is simply benzoic anhydride. In the last example, the name is based on phthalic acid and the name is simply phthalic anhydride Simple amides are named by replacing the ending -oic acid with -amide 1. Select the longest continuous carbon cha in, conta ining the acyl group, and derive the parent name by placing the -e ending with - amide 2. Num ber the carbon chain, beginning at the end nearest to the acyl group 3. Num ber the substituents and write the name, listing substituents alphabetically 4. Acid halide substituents attached to rings are named using the suffix - carboxamide 5. If the nitrogen atom is further substituted, the substituents are preceded by N-to indicate that they are attached to the nitrogen Several simple examples are shown below3. Number the substituents and write the name, listing substituents alpha betically. Several simple examples are shown below: In the first example, the parent chains are both pentane; hence the name, pentanoic anhydride (also as bis-pentanoic anhydride). In the second example, there are two parent chains; ethanoic acid and butanoic acid; hence the name butanoic ethanoic anhydride (acetic can be used in place of ethanoic). In the third example, the name is based on benzoic acid as the parent, and the name is simply benzoic anhydride. In the last example, the name is based on phthalic acid and the name is simply phthalic anhydride. Simple amides are named by replacing the ending -oic acid with -amide . 1. Select the longest continuous carbon chain, containing the acyl group, and derive the parent name by replacing the -e ending with -amide. 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 -carboxamide. 5. If the nitrogen atom is further substituted, the substituents are preceded by N- to indicate that they are attached to the nitrogen. Several simple examples are shown below: