Organotin phosphates

Otera, J., Niiho, Y. and Nozaki, H. (1991) Oxirane ring-opening with alcohol catalysed by organotin phosphate condensates. Complete inversion at tertiary and henzylic centers. Tetrahedron, 47, IClS-lCiA, Corey, E.J. and Helal, C.J. (1993) A catalytic enantioselective synthesis of chiral monosuhstituted oxiranes. Tetrahedron Letters, 34, 5227-5230. 

Organotin phosphates catalyse epoxide polymerisation, and triflates the hydrostannation of aldehydes and ketones,while triorganotin enolates, which result from the alkoxide and alkenyl acetates, are used to couple ciC-haloketones (to 1,4-diketones and... 

Mossbauer spectroscopic titration of [Me2Sn(IV)] and [MesSnflV)] hydroxides with ligands mimicking nucleic acid phosphate sites and with native DNA was the aim of work by Barbieri et al. A series of aqueous solutions of each system, formed by the organotin(IV) hydroxides and the phosphate ligands used... 

The polymeric organotin carbonate is less volatile than the oxide and, in this connection, tris(tributylstannyl) phosphate, (Bu3Sn)3P04, which is likely to have a similarly self-associated structure [cf., (MejSn)3(P04)2-8 HjO (593)], is also being used as a wood preservative (533) in Holland. 

This technique has been used for the determination of polychlorobiphenyls, polychlorodibenzo-p-dioxins, polychlorodibenzofurans, alkyl phosphates, chlorinated insecticides, organophosphorus insecticides, triazine herbicides. Dacthal insecticide, insecticide/herbicide mixtures, mixtures of organic compounds and organotin compounds in soils, and polyaromatic compounds, polychlorobiphenyls, chlorinated insecticides and organotin compounds in non-saline sediments and anionic surfactants in sludges. 

Lietal [42] demonstrated that, whereas AAS is usually insensitive to organotin compounds, the addition of tributyl phosphate enhances sensitivity considerably. Tributyltin at 1000 °C converts organotin to SnP207 and Sn2P2C>7. 

Tributyltm species, especially (Bu3Sn)20 and tributyltin phosphate and naphthenate, have been used in wood preservation as fungicides and as biocides for destructive insects. Tributyltins (and to a lesser extent, triphenyltins) have been used in marine antifoulant paints due to their broad range activity. The use of organotin polymers in which the... 

Concerning the oxygen-containing bidentate ligands [R E02+ ] and MC, discrete dimeric, tetrameric and hexameric ring assemblies have been reported for organotin carboxylate, phosphinate, phosphonate monoester, phosphate diester, " sulfonate, and tungstate derivatives. 

In addition to the local contamination numerous substances were detected within the nonextractable fraction, that are common riverine contaminants including e.g. phosphates, nitro compounds, UV-protectors, pesticides, fragrances, organotin compounds and halogenated aromatics (see Table 2). 

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