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Biocidal organotin compounds: Part 1. Preparation and characterization of triorganotin(IV) 4-pyridyl- and 2-pyrimidyl- thioacetates and the crystal structure of triphenyltin(2-pyrimidylthioacetate)

✍ Scribed by A. Chakrabarti; Sk. Kamruddin; T. K. Chattopadhyaya; A. Roy; B. N. Chakraborty; K. C. Molloy; E. R. T. Tiekink

Publisher: John Wiley and Sons
Year: 1995
Tongue: English
Weight: 584 KB
Volume: 9
Category: Article
ISSN: 0268-2605
DOI: 10.1002/aoc.590090409

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✦ Synopsis

The preparation and spectroscopic characterization of [R3Sn(O2CCH,SC5H,N-4)], R = Ph, benzyl (Bz), cyclohexyl (c-Hex) and n-Bu, and of [R,Sn(02CCH2SC,H,N2-2,6)J, R =Me, Ph and n-Bu, are reported. The 2-pyrimidyl compounds feature trigonal bipyramidal tin centres with trans-R,SnO, geometries as was confirmed by X-ray crystallography for [Ph3Sn(02CCH2SC4H3N2-2,6].fi By contrast the 4pyridyl compounds have trigonal bipyramidal geometries in the solid state (arising from intermolecular Sn-.

.N interaction) and tetrahedral geometries in solution. The biocidal activity of these compounds against the fungi Helminthosporium muydis (ITCC 2675) and H. oryzue (ITCC 2537), both of which damage crops such as maize and rice, shows promise. Encouraging is the observation that the compounds show no adverse phytotoxicity at concentrations to M.

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