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Estimation of dissociation energy in donor-acceptor complex AuCl x PPh3 via topological analysis of the experimental electron density distribution function.

The high-resolution X-ray diffraction analysis and plane-wave density functional theory were applied to the investigation of charge density distribution in the donor-acceptor complex of AuCl with PPh3. The approach allows us to estimate the atomic charges, the charge transfer, the energy of weak interactions (Au...H, Au...C, H...Cl, etc.), and Au-P bond energy directly from the experimental data.