Triaryltin compound

Trialkyltin and triaryltin compounds possess powerful biocidal properties. These are manifested to a high degree only when the tin atom is combined directly with three carbon atoms, as in trialkyl compounds (R3SnX) biocidal effects are at a maximum when the total number of carbon atoms attached to Sn is 12. These compounds are used as fungicides, insecticides and as pest control in agricultural applications29. 

Triaryltin compounds such as triphenyltin hydroxide (TPTH, Fentin hydroxide, Du-Ter, I), or triphenyltin acetate (TPTOAC, Brestan, II) have been shown to be effective as protectant fungicides. These compounds have demonstrated other activity such as antifoulants, bactericides and algi-cides. Due to their low phytotoxicity they have been developed for plant protection. In several cases they have been reported to exhibit the unusual property of deterring insects from feeding. (2 )... 

Independent work of H rtel (Farbwerke Hoechst, Germany) (12) showed that in the laboratory trialkyl- in particular tri-butyltins are better fungicides than triaryltin compounds, but that the reverse is true in the field. This has been ascribed For an extensive review on all present organotin applications, see Luijten (11). 

Triaryltin compounds are poorly absorbed by the digestive tract, but the inhalation of triphenyltin compounds may cause headache, digestive disorders, shortness of breath, and loss of consciousness. Tetraphe-nyltin has not been described as toxic. 

Ortho- and mela-substituted tetra- and triaryltin compounds were studied and meta substituents appear to exert electronic effects on /(Sn,C) couplings since better a-electron acceptors increase such couplings. 

A wide variety of labelled compounds can be synthesized by a two-step process involving the formation of a trialkyl- or triarylstannyl derivative. In the first step, a trialkyl- or triaryltin group is added to (i) a jt bond of an alkene or an alkyne, or (ii) an aryl group in the substrate. Then, in the second step, the trialkyl- or triarylstannyl group is replaced by either (i) an isotope of hydrogen or (ii) an isotopically labelled group78,125,126. 

Organometallic and Coordination Compounds. - Crystallization of ferrocene and ruthenocene substituted in the 1- and T-positions by two nitronyl nitroxide radicals gave the new crystal phases p-1 (besides the known phase a-1, a-2, and a-2 whose structures were determined by X-ray analysis and were investigated by C and H NMR spectroscopy with MAS NMR. The solid state Sn CP MAS NMR spectra of a series of triaryltin chlorides of the form ArsSnCl have been acquired. The indirect spin-spin coupling constants (J( Sn- C1)), quadrupolar-dipolar shifts (6( Sn- Cl)), and the Sn chemical shift tensors were extracted. " Powders of the zinc and copper(II) dimethyl-(MDtc), diethyl-(EDtc), and morpholinedithiocarbamate (MfDtc) complexes quantitatively absorb hexamethyleneimine (Hmi) to produce the adducts... 

The first G12-Sn-bonded complex (PhjSnljZn (55) was synthesized from ZnCl (Scheme 12.18) [45]. After that, a series of G12-Sn-bonded compounds have been prepared by hydrostannolysis of RjM or RMCl (R = alkyl or aryl, M = G12) by a trialkyl-/triaryltin hydride... 

Bis(triaryltin)oxides react with carbon disulfide and carbonyl sulfide in a similar manner to afford the corresponding sulfides in high yields. Similarly, Pb, Hg and As metal organic compounds with metal-oxygen bonds or metal-hydroxy bonds undergo this reaction. 

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