Synthesis, crystal structure and study of the crystal packing in the complex bis(4-aminopyridine-jN1)- dichloridocobalt(II)

OLGA C. SÁNCHEZ M.; FEDERICO MOVILLA; MARICEL RODRIGUEZ; FLORENCIA DI SALVO

ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS

WILEY-BLACKWELL PUBLISHING, INC

Lugar: Londres; Año: 2017 vol. 73 p. 399 - 406

0108-2701

Despite the large number of reported crystalline structures of coordination complexes bearing pyridines as ligands, the relevance of pi-pi interactions among these hereroaromatic systems in the stabilization of their supramolecular structures and properties is not very well documented in the recent literature. The title compound, [CoCl2(C5H6N2)2], was obtained as bright-blue crystals suitable for single-crystal X-ray diffraction analysis from the reaction of 4-aminopyridine with cobalt(II) chloride in ethanol. The new complex was fully characterized by a variety of spectroscopic techniques and single-crystal X-ray diffraction. The crystal structure showed a tetrahedral complex stabilized mainly by bidimensional motifs constructed by pi-pi interactions with large horizontal displacements between the 4-aminopyridine units, and N-H...Cl hydrogen bonds. Other short contacts, such as C-H...Cl interactions, complete the three dimensional arrangement. The supramolecular investigation was extended by statistical studies using the Cambridge Structural Database and a Hirshfeld surface analysis.