Polystannane High Polymers

Careful reinvestigations of Wurtz coupling procedures have now also successfully led to the isolation of high molecular weight polystannanes. The first detailed report of the preparation of polystannanes by Wurtz coupling in a refereed journal was 

In the Sandorfy C model, the degree of delocalization can be appreciated by consideration of the ratio of the resonance integrals p for geminal (same atom) 

Band structure calculations have also been reported for hypothetical polystannanes 6.4 (R=R =H), and the results have been compared with those for analogous polysilanes and polygermanes [15]. The band gap (Eg) was calculated to decrease in the 

Polymer Conjbrmation Band gap Effective hole Effiective electron Rif. 

A significant drawback with regard to the practical application of polystannanes is their air- and moisture sensitivity. This is not so severe in the solid state, but the materials are appreciably sensitive in solution. Nevertheless, the properties of these 

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A significant drawback for the practical application of polystannanes is their air and moisture sensitivity. This is not so significant in the solid state but the materials are appreciably sensitive in solution. Nevertheless, the properties of these fascinating materials are under detailed scrutiny." The polymers are reasonably thermally stable up to ca. 270 °G, and polystannane 215 (R = y>-TuG6H4) yields tin metal, when heated under nitrogen to 400 °G, and tin oxides in air, with a decomposition onset at around 225 °G. Polystannanes are highly photosensitive and exhibit... 

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