| Summary: | Two new Co(II) and Cu(II) azido complexes with 4-picoline (<b>4-Pic</b>) and pyridine-2-carboxaldoxime (<b>HAld</b>) were synthesized by self-assembly of the organic ligand and the M(II) nitrate in the presence of azide as a co-ligand. Their structures were determined to be [Co(4-Pic)<sub>4</sub>(H<sub>2</sub>O)(N<sub>3</sub>)]NO<sub>3</sub>*H<sub>2</sub>O*4-Pic (<b>1</b>) and [Cu(HAld)(Ald)(N<sub>3</sub>)] (<b>2</b>) using X-ray single crystal diffraction. In complex <b>1</b>, the coordination geometry is a slightly distorted octahedron with a water molecule and azide ion located trans to one another. On the other hand, complex <b>2</b> has a distorted square pyramid CuN<sub>5</sub> coordination sphere with N-atoms of the organic ligand as a basal plane and azide ion as apical. All types of intermolecular contacts and their contributions in the molecular packing were analyzed using Hirshfeld analysis. The intermolecular contacts, H…H (53.9%), O…H (14.1%), N…H (11.0%) and H…C (18.8%) in <b>1</b>, and H…H (27.4%), N…H (27.7%), O…H (14.7%) and H…C (13.6%) in <b>2</b> have the largest contributions. Of all the contacts, the O…H, N…H and C…C interactions in <b>2</b> and the O…H, N…H and H…C in <b>1</b> are apparently shorter than the van der Waals radii sum of the interacting atoms. Atoms in molecules (AIM) topological parameters explained the lower symmetry of the coordinated azide in <b>1</b> than <b>2</b>.
|
|---|