Sr2CuO2Cl2. signifies a virtually suitable scenario of a 2-D antiferromagnetic CuO2-plane and thus is of particular interest within the context from the origins of large TC superconductivity. We use The one-web-site impurity Anderson model with five Cu 3d orbitals and O 2p valence bands specified with the irreducible representations with https://okada4dsg.com/