Tin-arsenic bonds

Tabte 7. Sn NMR parameters of compounds with tin-phosphorus and tin-arsenic bonds."... 

Element-element bonds, addition to G-G multiple bonds arsenic—selenium bonds, 10, 782 boron—boron bonds, 10, 727 boron—sulfur bonds, 10, 778 B-S and B-Ge bonds, 10, 758 chalcogen—chalcogen additions, 10, 752 germanium—germanium bonds, 10, 747 germanium-tin bonds, 10, 780 overview, 10, 725-787 phosphorus—phosphorus bonds, 10, 751 phosphorus—selenium bonds, 10, 782 phosphorus-sulfur bonds, 10, 781 Se-Si and Se-Ge bonds, 10, 779 silicon-germanium bonds, 10, 770 silicon-phosphorus bonds, 10, 780 silicon-silicon bonds, 10, 734 silicon-sulfur bonds, 10, 779 silicon-tin bonds, 10, 770 tin-boron bonds, 10, 767 tin-tin bonds, 10, 748... 

Among other reagents causing fission of tin-carbon bonds are hydrogen halides, mercury halides, bismuth halides, thallium chloride, arsenic halides, phosphorus halides, sulphuric acid, nitric acid, sulphur, sulphur dioxide, sulphuryl chloride and organic acidsis. 

This chapter comprises polynuclear organotin compounds. The derivatives contain at least three different metal atoms arranged in a metal-metal-metal-chain and contain one or more tin-carbon bonds. Tin is always linked to a transition metal. The third metal in the chain is a different transition metal or arsenic, antimony and silicon. All compounds are listed in Table 262. The following synthetic methods are reported. 

From what has just been said with regard to carbon, it is evident that the atomicity of an element is, apparently at least, not a fixed and invariable quantity thus nitrogen is sometimes equivalent to five atoms of hydrogen, as in ammonic chloride, (i H Cl), sometimes to three atoms, as in ammonia (N" H,), mid sometimes to only one atom, as in nitrous oxide (N,0). But it is found that this variation in atomicity always takes place by the disappearance or development of an even number of bonds thus nitrogen is either a pentad, a triad, or a monad phosphorus and arsenic, either pentads or triads carbon and tin, either tetrads or dyads and sulphur, selenium, and tellurium, either hexads, tetrads, or dyads. 

The overall effect of estuarine water on the hydridisation process is thus one of reducing yields of the three tin species tested. It is expected that not only the dissolved and particulate organics and chloride influence formation of Sn-H bonds, but that other aquated metal ions play an important role, too. Several workers have reported that, for example, arsenic(III), arsenic(V), copper(II), nickel(II), mercuiy(II), lead(II) and silver(I) interfere by unknown means at low concentrations [702,753],... 

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