Sr2CuO2Cl2. Represents an almost excellent scenario of a 2-D antiferromagnetic CuO2-aircraft and so is of unique curiosity in the context of the origins of superior TC superconductivity. We've measured experimentally and analyzed theoretically the Ti 2p X-ray photoemission spectra (XPS) and the resonant enhancement of valence photoemissionat the Ti 2p https://okada4dsg.com/