Binuclear organotin (IV) complexes [Ph_3Sn(CH_3OH)O_2CC_6H_4CO_2 (CH_3OH)-SnPh_3]·2CH_3OH and [Ph_3SnS_2CN(CH_2CH_2)_2NCS_2SnPh_3]· 2CH_3OH (2) were synthesized by the reaction of Ph_3SnCl with terephthalate of piperazinylbisdithiocarbamate in 2: 1 molar ratio in methanol solution. their structure were characterized by elementary analysis, IR and ~1H NMR and the crystal structures were determined by X-ray single crystal diffraction. The crystal 1 belongs to monoclinic with space group P2_1/n, a = 1.5199(5) nm, b = 0.9000(3) nm, c = 1. 8206(6) nm, β=113.970(5)°, Z = 2, Z = 2, V = 2.2755(13) nm~3, D_c = 1. 413 g/cm~3, μ=1.146 mm~(-1), F(000) = 980, R_1 = 0.0353, wR_2 = 0.0606. The crystal 2 belongs to monoclinic with space group P2_1/c, a = 1. 5066(5) nm, b = 1.0875(4) nm, c = 1.3542(5) nm, β=91.614(5)°,Z = 2, V = 2.2178(14) nm~3, D_c = 1.498 g/cm~3, μ=1.351 mm~(-1), F(000) = 1008, R_1 = 0.0401, wR_2 = 0.1148. In the crystals of complexes 1 and 2, the tin atoms rendered five-coordinate in a distorted trigonal bipyramidal configurations. The complex 1 is formed 2-D network structure by packing along the a-axis through hydrogen bonding.

Key words: TIN COMPLEX, BENZENEDICARBOXYLIC ACID, PIPERAZINE P, CRYSTAL STRUCTURE