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Synthesis, spectral and biological studies of organotin(IV) complexes of heteroscorpionate

✍ Scribed by Rajkumar Joshi; Guruaribam Shashikumar Sharma; Vikrant Kumar; Athar Adil Hashmi; Satyendra Kumar; R. Achila; M. Ejaz Hussain

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
146 KB
Volume
20
Category
Article
ISSN
0268-2605

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✦ Synopsis

A heteroscorpionate ligand, potassium hydrobis(benzoato)(salicylaldehyde)borate (KL), has been synthesized. This was converted into organotin complexes R 2 SnL 2 and R 3 SnL complexes by mixing and stirring with a methanolic solution/suspension of organotin chloride. The ligand and its complexes were characterized by elemental analyses and spectral studies (IR, 1 H NMR, 13 C NMR, ESI mass spectra and Thermo gravimetric analysis (TGA)). Antibacterial and antifungal studies of these compounds were evaluated by the disc diffusion method at variable concentration against three species of bacteria (Staphylococcus aureus, Klebsiella pneumonia and Bacillius subtillis) and two species of fungi (Asperjillius fiavus and Candida albicans). It was found that triorganotin derivatives (R 3 SnL) of the ligand were more effective as compared with diorganotin derivatives (R 2 SnL 2 ). The organotin complexes of borates were tested for their algicidal activity on the cyanobacterial strains Aulosira fertilissma, Anabaena species, Anabaena variabilis and Nostoc muscorum and showed high to moderate toxicity towards the above species. The ligand and its complexes were also tested for its pH effect on soil in vitro for a duration of more than one month and it was found that they are able to kill pests without damaging the soil quality.

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