Abstract [SnCl4(Ph2PCH2-CH2PPh2)] CH2Cl2 has been characterized by a crystal structure determ ination. Space group P21/c, Z = 4, 5565 observed unique reflections with I > 2 σ(I), R = 0.043. Lattice dimensions at -70 °C: a = 1141.4(6), b = 2178.3(11), c = 1399.1(7) pm, β = 108.96(3)°. The complex forms monomeric molecules with the 1.2-bis(diphenylphosphino)ethane as chelating ligand. Bond lengths (average): Sn - P 266.7 pm, Sn - Cl 241.8 pm.