Oxidative Addition Reactions of Sn(II) And Pb(II) with Some Hydrazide And Hydrazone
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Bivalent tin compounds can be easily transformed to tetravalent compounds by oxidizing agents. The use of ortho-quinones for oxidation of transition metals has been the subject of many publications, but few analogous studies for main group metals have been reported. In continuation of earlier work on ligands containing hydrazide, we now report that the reaction of SnCL with both benzhydrazide (BH) benzyl benzhydrazone (BBH) in alcohol gives Sn(BH)CL, and and Sn(BBH)Cl2. A series ofadducts involving neutral donors such as 1,10-phenanthroline (phen) and 2,2'-bipyridine (bipy) are also formed. Upon oxidation of Sn(BH)Ck with L, the product may be six coordinate tin (IV) complex Sn(BH)LCl2. The reaction with tetrachloro-(TCQ) and tetrabromo-(TBQ) benzoquinone (o-02C6X4, X=C1 or Br) gives the oxidative addition products Sn(BH) C6X402C12. Finally Sn(II) and Pb(II) complexes react smoothly at room temperature with napthoquinone to form Sn(IV) and Pb(IV) complexes.