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Behavioural dynamics in the biological control of pests: role of silicon complexes
Author(s) -
Belwal Savita,
Fahmi Nighat,
Singh R. V.
Publication year - 2008
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.1426
Subject(s) - chemistry , silicon , sulfur , trigonal bipyramidal molecular geometry , dithizone , schiff base , elemental analysis , in vivo , proton nmr , oxygen atom , atom (system on chip) , stereochemistry , crystallography , molecule , nuclear chemistry , inorganic chemistry , organic chemistry , biology , microbiology and biotechnology , computer science , embedded system
Abstract The complexes of silicon (IV) with Schiff base ligands (L 1 H and L 2 H of isatin derivatives) having a sulfur and oxygen donor system were prepared by the reactions in methanol environment. These were isolated and characterized by elemental analysis, molecular weight determinations and conductance measurements. On the basis of electronic, infrared, 1 H, 13 C and 29 Si NMR spectral studies, trigonal bipyramidal geometry was suggested for the resulting complexes. These data support preferential binding of sulfur and oxygen atom to the silicon atom. The disease resistance activities of the ligands and their corresponding complexes were examined successfully in in vitro and in vivo experiments, against pathogenic fungi and bacteria. Results were quite encouraging and these were compared with the standard pesticides Bavistin and Streptomycin. Copyright © 2008 John Wiley & Sons, Ltd.