All the calculations in Table were performed using the geometry optimized at the same level of theory, i.e. MP2/aug-cc-pVDZ. In addition to the multipole moments, the induction calculations made use of the molecular dipole polarizability, ↵ ij , dipole-quadrupole polarizability, A ijk , and the quadrupole-quadrupole polarizability, C ijkl . The tracless cartesian polarizabilities are given in Table . The transformation from the traced multipole-multipole polarizabilities to the traceless counterparts are given by equations (9).