Abstract
A novel mononuclear zinc coordination compound with formula [Zn(Hsal)2(Py)2] (H2sal = salicylic acid, Py = pyridine) was prepared by mixing aqueous solutions of sodium salicylate and zinc sulfate in 1:1 molar ratio, and to the resulting solution pyridine was added dropwise. The obtained compound was characterized by elemental analysis, IR spectroscopy, and its crystal structure was determined by single-crystal X-ray diffraction method. X-ray structure analysis has shown that the central zinc ion is four-coordinated by two monodentate salicylato ligands and two pyridine molecules, forming a distorted tetrahedron. Since the asymmetric unit consists of two halves of coordination molecules, orthorhombic Ibca space group symmetry leads to two coordination molecules with slightly different geometry. The comparison between the two is given in terms of interatomic distances and angles, and also in terms of differences in intermolecular interactions obtained as a result of Hirshfeld surface analysis. With the assistance of C-H…O interactions, the adjacent molecules are linked into chains and further connected into three-dimensional network.
Highlights
Zinc is deemed to be a trace element in the human body, it is present in all organs, tissues and fluids, in total 2−4 grams
The research on zinc coordination chemistry has been initiated in the early 1940s by the discovery of erythrocyte carbonic anhydrase which is involved in the transport of carbon dioxide in blood
The asymmetric unit consists of two central zinc ions, each surrounded by a pyridine molecule and a salicylato ligand
Summary
Zinc is deemed to be a trace element in the human body, it is present in all organs, tissues and fluids, in total 2−4 grams. With their two functional groups, i.e. hydroxylic and carboxylic, salicylates are of great importance as ligands in coordination chemistry with their versatile coordination modes.[11] For example, zinc acetylsalicylate with formula [Zn(acsal)2(H2O)2] is used as anti-inflammatory agent.[12]. Despite the numerous researches in zinc chemistry, there are not as many reports on crystal structures containing the unsubstituted salicylato ligand and additional pyridine-like ligands as one might expect.[13] Only four. Kitanovski and Počkaj: New Zinc Coordination Compound with Simple Such crystal structures were reported till [14,15,16,17] which might indicate considerable difficulties with the crystallization of mononuclear coordination compounds of the entitled class. Figures depicting the structures were prepared with Mercury.[21]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
