Structures of Five ω-Phthalimidoaliphatic Carboxylic Acids

The crystal structures of five ω-phthalimidoaliphatic carboxylic acids are reported: 2-phthalimidoethanoic acid, C₁₀H₇NO₄ (I), 3-phthalimidopropanoic acid, C₁₁H₉NO₄ (II), 4-phthalimidobutanoic acid, C₁₂H₁₁NO₄ (III), 5-phthalimidopentanoic acid, C₁₃H₁₃NO₄ (IV), and 6-phthalimidohexanoic acid, C₁₄H₁₅NO₄ (V). Hydrogen bonding within the crystal structures of (I) and (II) produces chains of mol­ecules. In (IV) carboxylic acid dimers are formed through hydrogen bonding between centrosymmetric pairs. The structures of (III) and (V) show a similar motif to (IV) except that the hydrogen bonds are between symmetry independent molecules.

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