Synthesis, crystal structure and study of the crystal packing in the complex bis­(4-amino­pyridine-κN1)di­chlorido­cobalt(II)

OLGA CAROLINA SÁNCHEZ MONTILVA; FEDERICO MOVILLA; MARICEL GABRIELA 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 π-π 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.