ABSTRACT
The title compound, [Cs(CH3COO)(C28H16O8)(C2H5OH)]·C2H5OH, is the product of the complexation between one vasarene analogue [1], bis ninhydrin naphthalene-1,3-diol and CsF, where the F(-) ion has reacted with residual acetic acid (AcOH), to form a [1]·CsOAc complex. The inter-molecular inter-actions with the multiple oxygen-containing functional groups of the ligand, as well as O-Hâ¯O hydrogen bonds involving the ethanol solvent mol-ecules, stabilize the complex, forming a chain along [100]. Additional parallel-displaced π-π stacking, with an inter-planar distance of 3.669â (1)â Å, connect several unit cells in a three-dimensional supra-molecular structure, though, the larger size of AcO(-) (1.60â Å) compared to F(-) (1.33â Å) prevents the tight packing that was once achieved with other vasarene complexes of CsF.
ABSTRACT
The reaction between bis-ninhydrin resorcinol and benzyl-tri-methyl-ammonium fluoride in ethanol has produced the title compound, 2C10H16N(+)·2C24H13O8 (-)·1.5H2O, which contains a unique centrosymmetric supra-molecular dimeric entity, where two deprotonated ligands are held together via two strong and short [Oâ¯O = 2.4395â (13)â Å] [O-H-O](-) bonds of the type negative charge-assisted hydrogen bonds (-CAHB). The central aromatic rings of the ligands create parallel-displaced π-π stacking at an inter-planar distance of 3.381â (1)â Å, which helps stabilize the dimer. In the crystal, two symmetry-related solvent water mol-ecules with a site occupancy of 0.75 are attached to the carbonyl groups of the dimer by weaker O-Hâ¯O hydrogen bonds, forming chains along [101].
ABSTRACT
The title compound, C24H14O9·2CH3OH, displays a chair-shaped form. The two di-hydro-indenone ring systems are located above and below the central fused-ring system, the dihedral angles between the mean planes of di-hydro-indenone ring systems and the mean plane of central fused-ring system are 67.91â (5) and 73.52â (4)°, respectively. In the crystal, extensive O-Hâ¯O hydrogen bonds, weak C-Hâ¯O hydrogen bonds and C-Hâ¯π inter-actions link the mol-ecules into a three-dimensional supra-molecular architecture.