The synthesis and characterization by means of elemental analysis, IR, NMR spectra of 3-trichlorostannylpropionates, Cl3SnCH2CH2COOR (R = cyclopentyl, 1; cyclohexyl, 2; cyclopentylmethyl, 3; cyclohexylmethyl, 4), are described together with their complexes with dibutylsulfoxide (L1). 2,2'-bipyridyl (L ) and 1,10-phenanthroline (L3), Cl3SnCH2CH2COORo L (L= L1, a; L2, b; L3, c), formed by low-heating solid-state reaction. The crystal structures of 1 and 2 show that the tin atom adopts a distorted trigonal bipyramid geometry via intramolecular carbonyl oxygen to tin coordination [the distances of Sn-0 bond are 0.2351(6) ran for 1 and 0.2362(3) nm for 2]]. Compound 1 belongs to monoclinic with space group P2]/c, a = 0.9842(2) nm, b =1. 0923(8) nm, c = 1.23948(11) nm, /? = 93.894(15)°, V= 1.3294(4) ran3, Mr = 366.23, 7 = 4. Compound2 belongs to monoclinic with space group P2{/c, a = 1.04443(9) nm, b = 1.04823(7) nm, c = 1.28113(9) nm, / = 90. 953(8)°, V= 1.40239(19) nm3, Mr = 380.25, Z = 4

Key words: STRUCTURE CHARACTERISTICS;ORGANO TIN COMPOUNDS;CRYSTAL STRUCTURE, PROPIONATE;ANTICARCINOGEN;BIPYRIDINE P;PHENANTHROLINE, ELEMENTAL ANALYSIS;IR;1HNMR;XRD