Crystal and molecular structure of 1,1′,3,3′-tetraphenyloxaldiamidrazone

Abstract

1,1′,3,3′-Tetraphenyloxaldiamidrazone, C₂₆H₂₄N₆, crystallizes in the monoclinic system: space groupP2₁/c,a= 13.946(1) Å,b= 5.706(1) Å,c= 17.109(1) Å, β = 125.31(1) °,D _m = 1.254,D _c = 1.259 gcm⁻³ andZ= 2. Intensities were obtained from θ–2θ scans with a Syntex automated diffractometer using graphite-monochromated MoKα radiation. The structure was solved by direct methods. Full-matrix least-squares refinement of all positional and thermal (anisotropic for the nonhydrogen atoms and isotropic for the hydrogen atoms) parameters using 2022 reflections [I>2σ(itI)] converged at a conventionalR of 0.041. The molecule is characterized by a conjugated pi system which includes the central N=C−C=N moiety and two of the four aniline groups. No intermolecular and only weak intramolecular hydrogen bonds are present.