The complex[ (C_6H_5)_3SnO],,was prepared by the reaction of (C_6H_5)_3SnCl with triethylamine in methanol. It has been determined by IR, elemental analysis and X - ray structural analysis. It crystallizes in orthorhombic system with space group P2_12_12_1. The crystal data: a =0. 8339(15)nm,b =1.040(2)nm,c = 1. 8067(4) nm,Z = 4, V=1.5668(5)nm~3, Mr =365. 99,D_c = 1.552 g/cm~3 ,mμ = 1. 623 mm~(-1) ,F(000) =724, R =0.0278 ,wR =0.0511. The structure shows a distorted trigonal bipyramidal conf...