Crystal structure of bis(2-amino-5-chloropyridinium) tetrachloridocobaltate(II)

Abstract

In the structure of bis­(2-amino-5-chloro­pyridinium) tetra­chlorido­cobaltate(II), the essentially planar cations are connected through N—H⋯Cl hydrogen bonds to the tetra­hedral anion.

Crystal structure of bis(2-methyl-1H-imidazol-3-ium) tetrachloridocobaltate(II)

“…The Co-Cl distances [2.2506 (8)-2.2907 (8) Å ] are characteristic, and the mean distance (2.275 Å ) is in very good agreement with the average Co-Cl bond length of 2.275 Å calculated on basis of 337 isolated [CoCl 4 ] 2À anions from a set of 314 structures retrieved after a search in the Cambridge Structural Database (CSD, Version 5.36 with three updates; Groom & Allen, 2014). The longest Co-Cl distance in the title structure is observed for atom Cl4 which is an acceptor atom of two hydrogen bonds (Mghandef & Boughzala, 2015). The range for the Cl-Co-Cl angles [106.55 (3)-111.89 (3) ] indicates a slight distortion from the ideal tetrahedral geometry.…”

Crystal structure and Hirshfeld surface analysis of bis(2,6-diaminopyridinium) tetrachloridocobaltate(II)

“…The geometry of the CoCl 4 anion is characterized by a range of Co-Cl bond length from 2.2595 (14) to 2.2795 (13) Å and Cl-Co-Cl angles varying from 106.44 (5) to 112.69 (5) , building a slightly distorted tetrahedron. These data are in agreement with those found in related compounds (Mghandef & Boughzala, 2015). The calculated average values of the distortion indice as described by Baur (1974) corresponding to the different lengths and angles in the CoCl 4 tetrahedra [ÁI(Co-Cl) = 0.004 and ÁI(Cl-Co-Cl) = 0.0019] show a slight distortion of the tetrahedra.…”

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

“…The average Co-Cl bond length of 2.280 A ˚is consistent with that of similar complexes (Zhang et al, 2005;Jebas & Balasubramanian, 2006). The Cl-Co-Cl bond angles are in the range 105.46 (3)-117.91 (2) � with an average bond angle of 111.13 (2) � (Azadbakht et al, 2012;Mghandef & Boughzala, 2015). The smallest bond angle (Cl2-Co1-Cl3) correlates with the shortest Co-Cl bond lengths but there is no obvious correlation between bond lengths and the largest angle.…”