Thermally Induced Symmetry and Disorder: The Low-Temperature Crystal Structure of Diaquadichlorodimethyltin·15-crown-5

Abstract

The conformation of the crown ether in diaquadichlorodimethyltin·15-crown-5 has been verified by a low-temperature X-ray diffraction study. At −40°C, crystalline (CH₃)₂SnCl₂·2H₂O·15-crown-5, C₁₂H₃₀Cl₂O₇Sn, exists in the monoclinic P2₁/c space group with a = 9.259(6), b = 17.072(7), c = 13.406(4) Å, β = 108.15(4)°; ρ = 1.570 g cm³; Z = 4; N_obs = 2076; R_f = 7.92% The study corrects the atom identification errors found in the previously reported room-temperature structure, which resulted from ambiguities arising from dynamic disorder.