“…Typical van der Waals interactions, though, have little to no effect on the value of the coupling constant (either χ zz or eQq) in the axis system of the uncomplexed monomer. [62,63] Thus it was argued that the augmentation of the eQq(Cu) values of ArCuF, KrCuF, XeCuF, and OC-CuF along with the supporting binding energy calculations for the complexes (47, 45, and 63, and 150 kJ mol −1 [64], respectively), show the beginning of chemical bonding between the rare gas or CO and the copper fluoride. [42,58,59,61] [42,58,59] but is less than that of the N 2 -CuF and OC-CuF complexes, [60,61] suggesting the beginning of chemical bonding between H 2 and CuF.…”