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The asymmetric unit of the title compound, [CuCl3(C8H14N3)(H2O)]·H2O, comprises a neutral complex and a mol­ecule of free water. The complex contains coordinated CuII ions, with Cu—Cl distances ranging from 2.3471 (8) to 2.4011 (8) Å, and with Cu—N and Cu—O distances of 2.0775 (19) and 2.0048 (18) Å, respectively. The resulting coordination polyhedron is a trigonal bipyramid with the Cl atoms in the equatorial plane. In the crystal, O—H⋯Cl and O—H⋯O hydrogen bonds link the mol­ecules into a three-dimensional structure.

The title compound, {(C6H14N2O2)[Cu2Cl6(H2O)]}n, consists of 1,4-dihydroxy-1,4-diazoniabicyclo[2.2.2]octane dications and one-dimensional inorganic anionic {[Cu2Cl6(H2O)](2-)}n chains in which both five-coordinate [CuCl3(H2O)](-) and five-coordinate [CuCl3](-) units exist. These two distinct type of unit are linked together by one chloride ion and are bridged across centres of inversion to further units of their own type through two chloride ions, giving rise to novel polymeric zigzag chains parallel to the c axis. The chains are connected by O-H···Cl hydrogen bonds to produce R2(4)(16) ring motifs, resulting in two-dimensional layers parallel to the ac plane. These layers are linked into a three-dimensional framework with the organic cations via O-H···Cl hydrogen bonds. Hydrogen bonding between the chains, and between the chains and the organic cations, provides stability to the crystal structure.

In the title compound, [CoCl3(C6H13N2)], the tetra­hedrally coordinated CoII ion has Co—Cl distances ranging from 2.2220 (11) to 2.2449 (9) Å and a Co—N distance of 2.056 (2) Å. In the crystal, N—H⋯Cl hydrogen bonds link mol­ecules into chains in [010]. Weak C—H⋯Cl inter­actions stabilize further the crystal packing.

Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.005 Å; R factor = 0.050; wR factor = 0.122; data-to-parameter ratio = 8.9.The title compound, C 20 H 20 N 2 O, was synthesized by a solventfree one-pot three-component domino reaction of naphthalen-2-ol, nicotinaldehyde and pyrrolidine. The dihedral angle between the naphthalene ring system and the pyridine ring is 74.22 (6) . The pyrrolidine ring assumes an envelope conformation with the N atom as the flap. An intramolecular O-HÁ Á ÁN hydrogen bond stabilizes the molecular conformation. Related literatureFor the synthesis and structure of a related compound, see: Wang (2012). ExperimentalCrystal data