Draw structures to correspond with the following common and systematic names:


(f) benzoic propionic anhydride
(g) benzamide

Verified step by step guidance

1. Identify the functional groups present in each compound name. For benzoic propionic anhydride, recognize that it is an anhydride formed from benzoic acid and propionic acid. For benzamide, identify the amide functional group derived from benzoic acid.
2. For benzoic propionic anhydride, draw the structure of benzoic acid (C6H5COOH) and propionic acid (CH3CH2COOH).
3. Combine the two acid structures to form the anhydride by removing a water molecule (H2O) and connecting the two acyl groups (C6H5CO- and CH3CH2CO-) through an oxygen atom.
4. For benzamide, start with the structure of benzoic acid (C6H5COOH) and replace the hydroxyl group (-OH) with an amine group (-NH2) to form the amide linkage.
5. Ensure that the aromatic ring (benzene) is correctly represented in both structures, with the appropriate functional groups attached to the benzene ring.

Key Concepts

Anhydrides

Anhydrides are compounds formed from the removal of water from two carboxylic acids. They typically have the general formula RCO-O-COR', where R and R' are hydrocarbon chains. In the case of benzoic propionic anhydride, it is derived from benzoic acid and propionic acid, indicating a linkage between the two acid moieties.

Benzamide

Benzamide is an aromatic amide derived from benzoic acid, where the hydroxyl group (-OH) of the carboxylic acid is replaced by an amine group (-NH2). Its structure consists of a benzene ring attached to a carbonyl group (C=O) and an amine group, making it an important compound in organic synthesis and pharmaceuticals.

Nomenclature in Organic Chemistry

Nomenclature in organic chemistry refers to the systematic method of naming chemical compounds based on their structure and functional groups. The International Union of Pure and Applied Chemistry (IUPAC) provides rules for naming compounds, which helps in identifying the structure and properties of the compound from its name, such as recognizing the presence of functional groups like anhydrides and amides.