Dialkyltin compounds structure

Diorganotin(iv) derivatives of diphenic acid 233 were prepared by reaction of dialkyltin(iv) oxide with diphenic acid and its sodium salt in 1 1 molar ratio (Figure 9). Structure of these compounds was confirmed by IR, H, and 13C... 

It is also worth mentioning here that two compounds containing a Zn Sn coordinate bond have been reported. The first of these is the sole example of a dialkyltin species (see Tin Organometallic Chemistry) stabilized by coordination to zinc-/3-diketonate. It was obtained by reaction of bis[3-dimethylamino)propyl]zinc with bis(dibenzoylmethanato)tin (equation 37) and its molecular structure shows a Zn Sn bond length of 2.634 A. The second compound is... 

The polycondensation of BHET to PET proceeds in the melt at temperatures of 270-305 °C, under vacuum (< 1 mbar absolute pressure) and in the presence of Lewis acid metal compounds, such as titanium alkoxides, dialkyltin oxide, gallium oxide, germanium oxide, thallium oxide, lanthanide salts, and most commonly, antimony oxide [1,2, 22-26]. Under polymerization reaction conditions, these catalysts are generally converted to their alkoxides with ethylene glycol. Typical of such alkoxides is antimony(III) glycolate, the active catalyst for the majority of the world s PET production [27] (cf. Structure 1). 

No compounds of this structure have been reported in the older literature, though there is only a formal difference between a dialkyl(dialkyltriazeno)tin halide reported in this chapter to dialkyl(bipyridino)tin dihalide listed in Chapter as addition compound of dialkyltin dihalide. The compounds list-... 

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