Diazido­bis(1,10-phenanthroline)cobalt(III) perchlorate

The title cobalt(III) complex, [Co(N₃)₂(C₁₂H₈N₂)₂]ClO₄, has been synthesized and structurally characterized. The complex cations have distorted octa­hedral geometry, formed by two chelating 1,10-phenanthroline ligands and two azide ligands in a cis configuration. The cations and anions lie on twofold rotation axes. The ions are linked together into a linear one-dimensional chain by hydrogen bonding.

Racemic 1,1'-bi-2-naphthol dimethyl­formamide sesquisolvate: a redetermination

In the crystal structure of the title compound, C₂₀H₁₄O₂·1.5C₃H₇NO, one of the hydroxyl groups forms a hydrogen bond to the dimethyl­formamide (DMF) mol­ecule that lies on a general position and the other a hydrogen bond to the DMF mol­ecule that lies on a twofold rotation axis. The naphthyl residues are almost perpendicular to each other.

(S)-(-)-1,1'-Bi-2-naphthol dimethyl­formamide sesquisolvate

In the crystal structure of the title compound, C₂₀H₁₄O₂·1.5C₃H₇N O, one of the hydroxyl groups forms a hydrogen bond to the dimethyl­formamide (DMF) mol­ecule that lies on a general position and the other a hydrogen bond to the DMF mol­ecule that lies on a twofold rotation axis. The naphthyl residues are aligned at 75.8 (1)° with respect to each other.

Dicyclo­hexyl­ammonium 1-(2-hydr­oxy-1-naphth­yl)-2-naphtholate

In the title compound, C₁₂H₂₄N⁺·C₂₀H₁₃O₂⁻, the naphtholate anions are linked via an O—H...O hydrogen bond, and are connected to the dicyclo­hexyl­ammonium cations by N—H...O hydrogen bonds.