The n-butyl alcohol solution of o-bromobenzyl bromide or p-bromobenzyl bromide and Sn was heated at reflux for 6 h toyield tri(o-bromobenzyl)tin bromide (1) and tetra(p-bromobenzyl)tin (2). The crystal and molecular structures of compounds 1 and 2 weredetermined by X-ray diffraction analysis. The crystal 1 is rhombohedral, space group R-3 with a=1.3389(3) nm, b=1.3389(3) nm, c=2.1896(8) nm, V=3.3993(16) nm³, Z=6, D_x=2.077 Mg·m^－3, μ(Mo Kα)=81.83 cm^－1, F(000)=2004, R₁=0.0477, wR₂=0.1372. The crystal 2 belongs to orthorhombic, space group Fdd2 with a=2.1027(7) nm, b=2.3034(8) nm, c=1.1431(4) nm, V=5.536(3) nm³, Z=8, D_x=1.917 Mg·m^－3, μ(Mo Kα)=67.11 cm^－1, F(000)=3056, R₁=0.0358, wR₂=0.0659. The bondlengths of Sn—C are 0.2160(8) nm and 0.2175～0.2178 nm, respectively. The length of Sn—Br is 0.2491(3) nm. The tin atom has a distorted tetrahedral geometry.

Key words: tri(o-bromobenzyl)tin bromide, tetra(p-bromobenzyl)tin, crystal structure