Hydrogen and Halogen Bonds in Triiodoaminobenzoates of Amine Bases

The crystal structures of three organic salts of triiodaminobenzoic acid (1–3) and triiodaminobenzoic acid monohydrate (4) are described, the structural features are established by the X-ray diffraction method. Compound 1: C20H19I6N3O6, FW 1158.78; monoclinic crystal system, space group Сс; unit cell parameters: a = 32.0782(10) Å, b = 9.5284(3) Å, c = 9.3745(3) Å; α = 90°, β = 90.0(1)°, γ = 90°; V = 2865.35(16) Å3, Z = 4, ρX = 2.684 g/cm3. Compound 2: C16H15I6N3O4, FW 1074.71; monoclinic system, space group P21/c; unit cell parameters: a = 8.990(5) Å, b = 28.541(11) Å, c = 9.945(5) Å; α = γ = 90°, β = 91.23(2)°; V = 2551(2) Å3, Z = 4, ρX = 2.798 g/cm3. Compound 3: C17H17I3N2O4, FW 694.03; monoclinic system, space group I2/a; cell parameters: a = 36.02(2) Å, b = 7.254(5) Å, c = 16.468(9) Å; α = γ = 90°, β = 105.29(2)°; V = 4150(4) Å3, Z = 8, ρX = 2.222 g/cm3. Compound 4: C7H6I3NO3, FW 532.83; orthorhombic system, space group Iba2; unit cell parameters: a = 30.2146(4) Å, b = 13.9830(2) Å, c = 5.80740(10) Å; α = β = γ = 90°; V = 2453.57(6) Å3, Z = 8, ρX = 2.885 g/cm3. The 7-methylquinoline salt is devoid of halogen bonds because of the peculiarities of the stacking of flat molecules. For two compounds (3 and 4), the features of their thermolysis are determined by thermal analysis (in an argon atmosphere): at the first stage (52 and 73°C, respectively), the loss of crystallization water occurs; at 700°C thermolysis of both compounds gives glassy carbon as the decomposition product.