Crystal structure and Hirshfeld surface analysis of 6,6′-dimethyl-2,2′-bi­pyridine-1,1′-diium tetra­chlorido­cobaltate(II)

Abstract

The title salt features N—H⋯Cl and C—H⋯Cl cation-to-anion hydrogen bonds and complementary anion-to-cation Cl⋯π inter­actions.

In the title mol­ecular salt, (C₁₂H₁₄N₂)[CoCl₄], the dihedral angle between the pyridine rings of the cation is 52.46 (9)° and the N—C—C—N torsion angle is −128.78 (14)°, indicating that the ring nitro­gen atoms are in anti-clinal conformation. The Cl—Co—Cl bond angles in the anion span the range 105.46 (3)–117.91 (2)°. In the extended structure, the cations and anions are linked by cation-to-anion N—H⋯Cl and C—H⋯Cl inter­actions, facilitating the formation of R⁴₄(18) and R⁴₄(20) ring motifs. Furthermore, the crystal structure features weak anion-to-cation Cl⋯π inter­actions [Cl⋯π = 3.4891 (12) and 3.5465 (12) Å]. Hirshfeld two-dimensional fingerprint plots revealed that the most significant inter­actions are Cl⋯H/H⋯Cl (45.5%), H⋯H (29.0%), Cl⋯C/C⋯Cl (7.8%), Cl⋯N/N⋯Cl (3.5%), Cl⋯Cl (1.4) and Co⋯H (1%) contacts.