Sr2CuO2Cl2. represents a nearly perfect situation of a two-D antiferromagnetic CuO2-plane and so is of individual fascination during the context from the origins of substantial TC superconductivity. Now we have measured experimentally and analyzed theoretically the Ti 2p X-ray photoemission spectra (XPS) along with the resonant enhancement of valence photoemissionat https://okada4dsg.com/