Bis { oxo-bis [ (2-furylcarboxylato ) dibenzyltin (IV) ] } was synthesized by the reaction of 2-furylcarboxylic acid with the (PhCH2) 2SnO. The compound was tested against two human tumour cell lines: MCF- 7 and WiDr. The results showed that this compound had higher activities in vitro. The crystal structure was determined by X-ray diffraction study. The compound possesses centrosymmetric dimer structure mode with a four-member central endo-cyclic Sn2O2 unit in which the bridged oxygen atoms are tri-coordinated. Each bridged oxygen atom also connects with an era-cyclic tin atom. The endo-cyc\ic tin atoms are six-coordination and have coordination geometry of distorted octahedron. The ew-cyclic tin atoms are five-coordinate and have coordination geometry of monocapped trigonal bipyramid with very similarly distorted mode.

Key words: CRYSTAL STRUCTURE;FURANCARBOXYLIC ACID P;ORGANO TIN COMPOUNDS, ANTICARCINOGEN;BIOLOGICAL ACTIVITY