Crystal data for 1,3,5-trichlorobenzene and 1,3,5-tribromobenzene at 293 K

The powder data for 1,3,5-trichlorobenzene (1,3,5-TCB) and 1,3,5-tribromobenze (1,3,5-TBB) at 293 K are reported. These compounds are isomorphous, orthorhombic, P2₁2₁2₁, Z = 4 with a = 13.971 (3), b = 13.251 (2), c = 3.921 (1) Å, V = 725.9 (4) Å³, D_x = 1.660 Mg m^-3 for 1,3,5-TCB and a = 14.244 (3), b = 13.577 (2), c = 4.084 (1) Å, V = 789.8 (5) Å³, D_x = 2.648 Mg m^-3 for 1,3,5-TBB. These values are more accurate than those previously reported [Milledge & Pant (1960). Acta Cryst. 13, 285-290]. The JCPDS Diffraction File Nos. are 34-1989 for 1,3,5-TCB and 34-1988 for 1,3,5-TBB.