Unsaturated Diorganotin Dihalides

10-X-phenanthroline in buffered AcOH detn. of complex formation and equil. const, by polarography, spectrophotometry and ion exchange X H, Me, 

By rxn. of (MeCH CH)4Sn with HgBr2 in Et20 in Ar atm. without isomerization (I888). 

Ethyl-(0-styryl)tin Dibromide SnCioHi2Br2 Et(PhCH CH)SnBr2 

By rxn. of EtSnHa and EtSnBra with PhC CH in presence of cat. AiBN, in 73% yield (I613). 

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Unsaturated functionally substituted diorganotin dihalides are listed in Table l4. Additional references to diorganotin dihalides may be found in Chapter... 

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