Anisotropy of the Diamagnetic Susceptibility in 3,5-dibromo-p-amino and 3,5-dibromo-p-hydroxybenzoic Acids

The mean molar susceptibility (χ$\text{}_{M}$) for the two compounds 3,5-dibromo-p-aminobenzoic acid, Br$\text{}_{2}$C$\text{}_{6}$H$\text{}_{2}$(p-NH$\text{}_{2}$)COOH, and 3,5-dibromo-p-hydroxybenzoic acid, Br$\text{}_{2}$C$\text{}_{6}$H$\text{}_{2}$(p-OH)COOH, has been determined. The principal molecular susceptibilities K$\text{}^{∥}$ and K$\text{}^{⊥}$ have been evaluated. The magnetic anisotropy of each of the two compounds was obtained. From the atonic coordinates, as given by the X-ray structure analysis of Br$\text{}_{2}$C$\text{}_{6}$H$\text{}_{2}$(p-NH$\text{}_{2}$)COOH, the crystal susceptibilities (χ$\text{}_{a}$, χ$\text{}_{b}$, and χ$\text{}_{c}$) have been calculated. The magnetic properties are interpreted in the light of the crystal structure.