Dibenzyltin complex with Sn2 O2 four-member-ring has been synthesized via the reaction of the 2-oxo-propionic acid salicylhydrazide with dibenzyltin dichloride .The complex has been characterized by IR ,1 H NMR spectra ,elemental analysis and the crystal structures have been determined by X-ray diffraction .It crystallizes in the monoclinic ,space group P21/c ,with a= 19 .100 2(5) ? ,b= 18 .425 6(5) ? ,c= 15 .362 6(4) ? ,α= γ=90° ,β=112 .754 0(10)° ,Z=2 ,V=4 985 .8(2) ?3 ,Dc=1 .474 Mg · m -3 ,μ(MoKα)= 1 .061 mm-1 ,F(000)= 2 240 ,R=0 .03...