The six novel drum organooxotin clusters [PhCH_2Sn(O) (O_2CCH= CHAr) ]_6 were synthesized by the reaction of [(PhCH_2)_3Sn]_2O with ArCH= CHCO_2H in 1 -2 molar ratio. The crystal structure of [PhCH_2Sn(O)- (O_2C CH=GHPh)]_6 was determined by X-ray single crystal diffraction study. The crystal belongs to triclinic with space group PI, a = 1. 6771(3) nm, 6 = 1.8020(4) nm, c =2.1073(4) nm, α = 108.111(3)°, β = 103.614 (3)°, γ = 104.679(3)°, Z = 2, 7 = 5.5033(18) nm~3, D_c = 1. 350 g/cm~3, μ. = 1.396 mm~(-1), F(000) =2208, R = 0.0606, wR = 0. 0698. The structure shows a distorted octahedron configuration with six coordination for the central tin atoms.

Key words: ORGANO TIN COMPOUNDS;CLUSTER COMPOUND;CRYSTAL STRUCTURE, ELEMENTAL ANALYSIS;IR;XRD;OXYGEN COMPOUNDS;CARBOXYLIC ACID