C9H13NO

C9H13NO is a molecular formula representing a family of organic compounds rather than a single substance. It contains nine carbon atoms, thirteen hydrogen atoms, one nitrogen atom, and one oxygen atom, giving a nominal molecular weight of about 151.21 g/mol. The hydrogen, nitrogen, and oxygen combination allows for a range of functional groups, and the formula has a degree of unsaturation of four, which is commonly associated with an aromatic ring such as a benzene ring.

Because C9H13NO can correspond to many different structures, it is best described by functional classes rather than a unique compound. Typical structural motifs that fit this formula include aromatic amines bearing a saturated hydrocarbon side chain that ends in a hydroxyl group, or related derivatives in which the oxygen appears as a hydroxyl or part of an ether or carbonyl-containing group. The presence of an aromatic ring is common, consistent with the four degrees of unsaturation implied by the formula.

Representative isomers include para- and meta-aminophenylpropan-1-ol, i.e., 4-aminophenylpropan-1-ol and 3-aminophenylpropan-1-ol. These compounds have the formula C9H13NO and illustrate how a benzene core can be substituted with an amino group and a saturated propyl alcohol side chain.

In practice, C9H13NO can describe many distinct compounds used in research and industry, including intermediates in organic synthesis and potential pharmaceutical or fragrance-related molecules. Distinguishing among them requires structural characterization techniques such as NMR, IR, and mass spectrometry.

---