(Z)-1-[2-(Tri-o-tolylstannyl)vinyl]cyclopentanol (1) and (Z)-1-[2-(tri-o-tolylstannyl)vinyl]-cyclohexanol (2) were synthesized byadditive reaction of the corresponding tri-o-tolyltin hydride to the triple bond of 1-ethynylcyclopentanol and 1-ethynylcyclohexanol, respectively. Allcompounds were characterized by elemental analysis, IR and ¹H NMR spectra. The crystal and molecular structures of 1 and 2 have been determined by single crystal X-ray diffraction analysis. The Sn atoms in 1 and 2 adopt a tetrahedral geometry distorted towards trigonal bipyramid duo to a weak intramolecular interaction between Sn and hydroxyl O atoms [the distances of Sn—O are 0.2771(4) nm for 1 and 0.2764(5)nm for 2]. Compound 1 belongs to monoclinicsystem with space group P2₁/n, a=1.0496(2) nm, b=1.7658(4)nm, c=1.3193(3) nm, β=90.60(3)°, V=2.4451(8) nm³, Z=4, R=0.0317, wR=0.0820. Compound 2 belongs to triclinic system with space group P1, a=0.85592(17) nm, b=0.93016(19) nm, c=1.6368(3) nm, α=83.76(3)°, β=82.69(3)°, γ=78.05(3)°, V=1.2600(4) nm³, Z=2, R=0.0377, wR=0.1030.

Key words: organotin(IV), tri-o-tolyltin hydride, synthesis, crystal structure