The magnetic susceptibility anisotropy of benzene is a measure of how the magnetic properties of the molecule differ along different axes. In benzene, the magnetic susceptibility anisotropy is primarily due to the ring current generated by the delocalized electrons in the aromatic ring.The magnetic susceptibility anisotropy of benzene can be calculated using the Pascal's constants for benzene. Pascal's constants are empirical parameters that relate the magnetic susceptibility of a molecule to its geometry and electronic structure.For benzene, the magnetic susceptibility anisotropy can be calculated using the following formula: = _ - _where _ is the magnetic susceptibility parallel to the plane of the aromatic ring, and _ is the magnetic susceptibility perpendicular to the plane of the aromatic ring.Using Pascal's constants for benzene, we have:_ = -36.5 x 10^-6 cm/mol_ = 71.0 x 10^-6 cm/molSo, the magnetic susceptibility anisotropy of benzene is: = -36.5 - 71.0 x 10^-6 cm/mol = -107.5 x 10^-6 cm/molTherefore, the magnetic susceptibility anisotropy of benzene is -107.5 x 10^-6 cm/mol. This negative value indicates that benzene is diamagnetic in the plane of the aromatic ring and paramagnetic perpendicular to the plane.