| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1404766 | Journal of Molecular Structure | 2016 | 7 Pages |
•Diorganotin(IV) complexes 1–3 were synthesized and characterized.•All the complexes adopt 5-coordinate structures in solution.•1 is a dimeric complex appended with free carboxylic acid groups.•Structure of 1 is hexacoordinated and has distorted octahedral geometry around tin atoms.•Complexes show effective anti-microbial activities.
Diorganotin(IV) complexes appended with free carboxylic acids were synthesized by reacting diorganotin(IV) dichlorides [R2SnCl2; R = Me (1), Bu (2) and Ph (3)] with an azo-imino carboxylic acid ligand i.e. 2-{4-hydroxy-3-[(2-hydroxyphenylimino)methyl]phenylazo}benzoic acid in presence of triethylamine. The complexes were characterized by elemental analysis, IR and multinuclear NMR (1H, 13C and 119Sn) spectroscopy. The structure of 1 in solid state has been determined by X-ray crystallography. Crystal structure of 1 reveals that the compound crystallizes in monoclinic space group P21/c and is a dimeric dimethyltin(IV) complex appended with free carboxylic acid groups. In the structure of 1, the Sn(IV) atoms are hexacoordinated and have a distorted octahedral coordination geometry in which two phenoxy oxygen atoms and the azomethine nitrogen atom of the ligand coordinate to each tin atom. One of the phenoxy oxygen atom bridges the two tin centers resulting in a planar Sn2O2 core. Topological analysis is used for the description of molecular packing in 1. Tin NMR spectroscopy study indicates that the complexes have five coordinate geometry around tin atom in solution state. Since the complexes have free carboxylic acids, these compounds could be further used as potential metallo-ligands for the synthesis of other complexes. The synthesized diorganotin(IV) complexes were also screened for their antimicrobial activities and compound 2 showed effective antimicrobial activities.
Graphical abstractDiorganotin(IV) complexes appended with free carboxylic acids were synthesized and characterized. The structure of 1 in solid state has been determined by X-ray crystallography. Crystal structure of 1 reveals that the compound is a dimeric dimethyltin(IV) complex containing free carboxylic acid groups. In the structure of 1, the Sn(IV) atoms are hexacoordinated and have a distorted octahedral coordination geometry. Topological analysis is used for the description of molecular packing in 1. NMR spectroscopy study indicates that the complexes appended with free carboxylic acids have five coordinate geometry around tin atom in solution state. Since the complexes contain free carboxylic acid, these compounds could be further used as potential metallo-ligands for the synthesis of other complexes. The synthesized diorganotin(IV) complexes were also screened for their antimicrobial activities and compound 2 found to exhibit effective antimicrobial activities.Figure optionsDownload full-size imageDownload as PowerPoint slide
