Sr2CuO2Cl2. Represents a virtually suitable situation of the two-D antiferromagnetic CuO2-airplane and thus is of specific curiosity from the context with the origins of substantial TC superconductivity. We have now calculated experimentally and analyzed theoretically the Ti 2p X-ray photoemission spectra (XPS) as well as resonant enhancement of valence photoemissionat https://okada4dsg.com/