title: Di-aqua-dichlorido-bis-(pyridine-κN)cobalt(II).
abstract: The title mol-ecule, [CoCl2(C5H5N)2(H2O)2], has -1 symmetry with the Co(II) ion situated on an inversion centre. The cation has a distorted octa-hedral coordination environment and is surrounded by two N and two Cl atoms in the equatorial plane, while the coordinating water O atoms occupy the axial positions. The crystal exhibits nonmerohedral twinning with two domain states, the volume fractions of which were refined to 0.883 (2) and 0.117 (3). The crystal packing is stabilized by O-H⋯Cl hydrogen-bond inter-actions, forming two-dimensional networks lying parallel to (001). The crystal packing also features π-π inter-actions between the pyridine rings, with centroid-centroid separations of 3.493 (3) and 3.545 (3) Å.
authors.affiliation: Department of Physics, S. R. R. Engineering College (A. Jeppiaar Institution), Old Mamallapuram Road, Padur, Chennai 603 103, India.
authors.forename: P S
authors.initials: PS
authors.lastname: Kannan
authors.affiliation: Department of Chemistry, Pondicherry University, Pondicherry 605 014, India.
authors.forename: A S
authors.initials: AS
authors.lastname: Ganeshraja
authors.affiliation: Department of Chemistry, Pondicherry University, Pondicherry 605 014, India.
authors.forename: K
authors.initials: K
authors.lastname: Anbalagan
authors.affiliation: Department of Physics, Presidency College (Autonomous), Chennai 600 005, India.
authors.forename: E
authors.initials: E
authors.lastname: Govindan
authors.affiliation: Department of Physics, Presidency College (Autonomous), Chennai 600 005, India.
authors.forename: A
authors.initials: A
authors.lastname: Subbiahpandi