Coordination Complexes Coordination environment Copper Copper complexes Copper compounds Crystallography, X-Ray Equatorial sites Hydrates Hydration Hydrogen Bonding Hydrogen bonds Inorganic compounds Intramolecular hydrogen bonding Ligands Models, Molecular Molecular Structure Molecular orientation Molecular shapes Octahedral environment Perchlorate anions Significant differences Solvents Stereoisomerism X ray crystallography article chemical structure chemistry coordination compound copper hydrogen bond