A new polymorph of 1,3-bis­(penta­fluoro­phen­yl)urea

The title compound, C(13)H(2)F(10)N(2)O, has been previously described in the space group Pbca with Z = 8 [Jai-nhuknan et al. (1997 ▶). Acta Cryst. C53, 455–457]. The current P2(1)2(1)2(1) polymorph was obtained from a tetra­hydro­furan solution. The penta­fluoro­phenyl rings make dihedral angles of 50.35 (6) and 54.94 (6)° with the urea fragment, in close accord with those reported for the first polymorph. In the crystal, both of the N—H groups donate H atoms to the same carbonyl O atom, forming a one-dimensional mol­ecular array along the a axis. There are close contacts between perfluoro­phenyl C atoms within the array [3.228 (3) Å] and halogen bonds are also observed between the arrays [F⋯F = 2.709 (2) and 2.7323 (18) Å].