4-Methoxybenzoic Acid
CAS number: 100-09-4
4-methoxybenzoic acid is a methoxybenzoic acid substituted with a methoxy group at position C-4. It has a role as a plant metabolite. It is functionally related to a benzoic acid. It is a conjugate acid of a 4-methoxybenzoate.
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Proposed mechanism for the one-pot PdII-catalyzed C–H iodination/ipso-iododecarboxylation of para-anisic acid.
Related Questions and Answers
Q: How does p-methoxybenzoic acid (PMBA) solubility vary with temperature and ethanol mass fraction?
A: Solubility increases with temperature and ethanol mass fraction. The dissolution enthalpy decreases with increasing ethanol mass fraction (0.6 > 0.8 > 1.0), indicating reduced solvation intensity.
A: MSZW and interfacial energy reach a maximum when the ethanol mass fraction is 0.8, resulting in the smallest crystal product size. This indicates PMBA needs to overcome a higher nucleation barrier at this composition.
A: At low saturation temperatures, PMBA follows a progressive nucleation mechanism (nucleation order m = 3.18–7.50), whereas at high saturation temperatures, it follows an instantaneous nucleation mechanism (m = 1.46–2.55).