Tin II Heterobimetallic and Oligometallic Derivatives

Department of Chemistry, Quaid-i-Azam University, Islamaba, Pakistan 

The aim and purpose of the synthesis of tin(II) heterobimetallic derivatives is to prepare such a material that could deliver both elements of a final material simultaneously, leading to formation of complex ceramic materials in a single step, and was envisaged in the deposition of SrTa206 directly from [SrTa2(OEt)6(/u.-OEt)4(/u.-bis-dmap)2] , where dmap = l,3-bis(dimethylamino)-2-propanoate. 

This strategy was adopted to alleviate tedious techniques of mixing multicomponent precursors with different properties. In view of their technological demands, tin(II) heterometallic alkoxides are the most studied class of compounds and their properties can be modulated by chelating ligands like /3-diketonates, carboxylates, and functionalized alkoxides for specific purposes. These compounds also facilitate the formation of oxoalkoxides, either by hydrolysis or by some side reactions. 

The reactivity of tin alkoxides with carboxylates is more complex than that of /3-diketonates because of the following competition reactions  

The ease of formation of various stable Sn(II) heterometallic species follow the order Sn(OR) Sn(02CR) Sn(/3-diketonate) , whereas the solubility of these materials decreases as Sn(OR) Sn((/3-diketonate) Sn(02CR) . 

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