Structure of 2-anilino-4,6-diphenoxy-1,3,5-triazine

C₂₁H₁₆N₄O₂,M_r=356.4, crystallized from methanol in the orthorhombic space groupP2₁2₁2₁,a=5.137(2),b=12.937(2),c=27.111(6) Å,V=1801.7(9) ų,D_x=1.314 g cm^–3,Z=4, CuK,=6.7 cm^–1,F(000)=744,T=293K. The structure was solved with direct methods and refined by full-matrix least squares to a finalR=0.069 for 1303 observed reflections. The angles between triazine and adjacent phenyl rings planes are about 24° for anilino, 56 and 76° for phenoxy groups. The conjugation of the lone pair at the exocyclic O or N atoms is stronger with triazine than with the benzene system because the correspondingtriazine-X(N, O) bonds are shorter by 0.04 to 0.07 Å than thebenzene-X.