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The crystal ofone-dimensional binuclear Organotin(Ⅳ) complex [(Bu2Sn)4(C11H6N2O5)2] was obtained in methanol.It has been characterized by elemental analysis,IR and tH NMR,and its crystal structure was determined by X-ray single-crystal diffraction.The crystal belongs to Triclinic,space group P-1 with a =9.033(5),b =9.329(6),c =19.119(11) (A),ct=80.638(7)°,β=88.577(9)°,γ=75.580(7)° Z=1,V=1539.4(16) (A)3,Dc =1.536 g/cm3,μ =1.658 mm-1,F(000) =716,R =0.0546 and wR =0.1085.X-ray single-crystai structure analysis reveals that the two tin atoms are five-coordinated into atrigonal bipyramidal geometry,the other two tin atoms are six-coordinated into a octahedral geometry.The resulting structure is a one-dimensional chain polymer containing Sn-O (2.402(6) (A)) bond.