Tetraorganotin Compounds Containing Carbonyl Groups and Derivatives

Previously most of the carbonyl derivatives of the organotin moiety have been regarded as Sn-C derivatives of the tautomeric ketone. It is now generally accepted that derivatives of 1,2- and l,5 icarbonyl compounds are Sn-0 chelates with the diketone acting as bidentate ligand. The corresponding ketone derivatives may exist in an equilibrium of both Sn-C and Sn-0 isomer with steric and electronic reasons for prevalence of either form. The reader is advised to check Chapter and Tables 192-19 for any given compound. 

As for the main volume caution should be exercised regarding the formulae used there. The tetraorganotin compounds containing carbonyl groups and derivatives listed in Table 112 are prepared by methods from the following scheme. 

R = organic group or hydrogen. Additional tetraorganotin compounds containing carbonyl groups and derivatives may be found in Chapters 2.5, 2.. 5, 2.5.5, and 2.6. 4-. 

By rxn. of EtsSnNMeg with AcOCH CHMe, in 50% yield (I7IO). 

OH2CH2CH2C(CO2Et) ioH - CH2CH2CH2C(C02Et) C0SnEt3 + Me2C0 (I7II). 

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TETRAORGANOTIN COMPOUNDS CONTAINING CARBONYL GROUPS AND DERIVATIVES... 

Additional tetraorganotin compounds containing carbonyl groups and derivatives are listed in Table 112. 

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