Organotin compounds direct

This type of metallic exchange is used much less often than 12-32 and 12-33. It is an equilibrium reaction and is useful only if the equilibrium lies in the desired direction. Usually the goal is to prepare a lithium compound that is not prepared easily in other ways, for example, a vinylic or an allylic lithium, most commonly from an organotin substrate. Examples are the preparation of vinyllithium from phenyl-lithium and tetravinyltin and the formation of a-dialkylamino organolithium compounds from the corresponding organotin compounds ... 

The direct and indirect assessment of the aneuploidy-inducing potency of a number of organotin compounds was reported by Jensen et al. (1991a). The effects of dimethyltin dichloride, diphenyltin dichloride, trimethyltin chloride, tributyltin chloride, and triphenyl-tin chloride at 10 -10 mol/1 on chromosomal contractions in cultures of human peripheral lymphocytes were investigated. Diphenyltin dichloride, trimethyltin chloride, tributyltin chloride, and triphenyl-tin chloride appeared to be very strong inducers of chromosomal supercontraction, indicating that these compounds induce aneuploidy, probably by affecting... 

Jensen KG, Andersen O, Ronne M (1991a) Direct and indirect assessment of the aneuploidy-inducing potency of organotin compounds. Alternatives to Laboratory Animals, 19(2) 214-218. 

Reactions of Allylic Trialkylstannnanes. Allylic organotin compounds are not sufficiently reactive to add directly to aldehydes or ketones, although reactions with aldehydes do occur with heating. 

However, cycloauration is, sometimes, difficult to achieve with direct activation of a C—H bond and transmetallation reaction of organomercury or organotin compounds with the appropriate gold compounds is, hence, frequently used. This procedure has been used with azobenzene, 36 A, A -dimethylbenzilamine,1937,1938 4,4 -dimethyl-2-phenyl-l, 3-oxaazoline,1938 1 - (dii zene,... 

Brinckmann [570] used a gas chromographic method with or without hydride derivatisation for determining volatile organotin compounds (e.g., tetram-ethyltin) in seawater. For nonvolatile organotin compounds a direct liquid... 

The conditions for reliable cyclic voltametry determination of trace Sn concentrations in sea water were investigated. All organotin compounds should be converted to Sn(II) by UV-photolysis adsorption on mercury drop in the presence of 40 pM of tropolone (1) cyclic voltametry stripping shows two cathodic peaks, corresponding to the two-step process Sn(IV) — Sn(II) -> Sn(0)29. A complex of Sn ions with catechol can be accumulated in a glassy carbon mercury film electrode, followed by stripping voltametry measurement in the cathodic direction, at pH 4.2-4.7. Interference occurs when Cu, Cd and Cr are present LOD 0.5 pg/L for 300 s accumulation30. 

Yamada, H., M. Tateishi, and K. Takayanagi. 1994. Bioaccumulation of organotin compounds in the red sea bream (Pagrus major) by two uptake pathways dietary uptake and direct uptake from water. Environ. Toxicol. Chem. 13 1415-1422. 

High performance liquid chromatography coupled with hydride generation-direct current plasma emission spectrometry has been used for trace analysis and speciation studies of methylated organotin compounds in water [263],... 

Pure tin was also used for the direct synthesis of organotin compounds. In 1948, unlike previous investigations, Harada obtained sodium stannite Na2Sn not by the metal fusion, but by the reaction of tin with sodium in liquid ammonia628. The reaction of Na2Sn with EtBr led to (Et2Sn)n. 

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