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metal-organic compounds
The title compound, [Sr(C7H5O4)2(C12H8N2)2(H2O)2]·2C12H8N2·4H2O, consists of an SrII complex, uncoordinated phenanthroline (phen) molecules and solvent water molecules. The SrII ion is located on a twofold axis and is coordinated by two phen ligands, two dihydroxybenzoate anions and two water molecules in a distorted tetragonal antiprismatic geometry. Partially overlapped arrangements exist between parallel coordinated and parallel uncoordinated phen rings; the face-to-face separations between the former (coordinated) and the latter (uncoordinated) rings are 3.436 (13) and 3.550 (14) Å, respectively. This difference suggests the effect of metal coordination on π–π stacking between phen rings.
metal-organic compounds
In the title compound, [Sr(C7H5O3)2(C12H8N2)2(H2O)2], the SrII ion is located on a twofold rotation axis and assumes a distorted square-antiprism SrN4O4 coordination geometry, formed by two phenanthroline (phen) ligands, two 2-hydroxybenzoate anions and two water molecules. Within the mononuclear complex molecule, intramolecular π–π stacking is observed between nearly parallel coordinated phen ligands, while normal intermolecular π–π stacking occurs between parallel phen ligands of adjacent complex molecules. Classic O—H
O and weak C—HO hydrogen bonding helps to stabilize the crystal structure.
O and weak C—HO hydrogen bonding helps to stabilize the crystal structure.
