2,3,4,5,6-Penta-bromo-phenol

The crystal structure of 4-chloro-thiophenol, C6H5ClS

C6H5ClS, monoclinic, P21/n (no. 14), a = 5.7461(2) Å, b = 9.7601(4) Å, c = 5.7466(3) Å, β = 95.869(2)°, V = 320.59(2) Å3, Z = 2, R gt (F) = 0.0216, wR ref(F 2) = 0.0545, T = 200 K.

The crystal structure of 2,6-dibromo-4-fluoroaniline, C6H4Br2FN

C6H4Br2FN, monoclinic, P21/c (no. 14), a = 17.0332(5) Å, b = 4.34070(10) Å, c = 21.9732(5) Å, β = 109.6910(10)°, V = 1529.61(7) Å3, Z = 8, R gt (F) = 0.0256, wRref (F 2) = 0.0518, T = 200 K.

The crystal structure of 2,6-difluorophenol, C6H4F2O

C 6 H 4 F 2 O ${\text{C}}_{6}{\text{H}}_{4}{\text{F}}_{2}\text{O}$ , orthorhombic, P 2 1 2 1 2 1 $P{2}_{1}{2}_{1}{2}_{1}$ (no. 19), a = 4.9287(5) Å, b = 10.1752(8) Å, c = 10.9156(10) Å, V = 547.42(9) Å3, Z = 4, R g t ${R}_{gt}$ (F) = 0.0248, w R ref $w{R}_{\text{ref}}$ ( F 2 ${F}^{2}$ ) = 0.0705, T = 200 K.CCDC no.: 2025946

The crystal structure of 2,6-dimethyl-4-nitro-phenol, C8H9NO3

C8H9NO3, monoclinic, P21/n (no. 14), a = 6.9121(4) Å, b = 26.9700(15) Å, c = 8.7204(5) Å, β = 106.152(3)°, V = 1561.48(16) Å3, Z = 8, R gt (F) = 0.0486, wR ref (F 2) = 0.1399, T = 200 K.

Anomalous halogen bonds in the crystal structures of 1,2,3-tri-bromo-5-nitro-benzene and 1,3-di-bromo-2-iodo-5-nitro-benzene

The title trihalogenated nitro-benzene derivatives, C6H2Br3NO2 and C6H2Br2INO2, crystallize in triclinic and monoclinic cells, respectively, with two mol-ecules per asymmetric unit in each case. The asymmetric unit of the tri-bromo compound features a polarized Br(δ+)⋯Br(δ-) inter-molecular halogen bond. After substitution of the Br atom in the para position with respect to the nitro group, the network of X⋯X halogen contacts is reorganized. Two inter-molecular polarized halogen bonds are then observed, which present the uncommon polarization Br(δ+)⋯I(δ-): the more electronegative site (Br) behaves as a donor and the less electronegative site (I) as an acceptor for the charge transfer.