Crystal Structure of Benzene-Solvate of Bis(benzophenone) Azine: A Color Polymorph

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A crystalline complex of bis(benzophenone) azine (BBA), solvated by benzene in a BBA:benzene = 1:1 ratio, was isolated as yellow crystals, and its crystal structure was determined by single-crystal X-ray diffraction analysis at 223 K. The complex crystallizes in the triclinic crystal system in the space group P1 ( / 2) with the cell parameters a = 8.646(6)?, b = 9.096(5)?, c = 9.217(6)?, α = 78.01(2)°, β = 64.23(2)°, γ = 67.39(2)°, Z = 1, and V = 601.9(6)?3. Benzene is embedded in a channel running along the c-axis. The yellow color of the complex, in contrast to the colorless solvent-free crystals, is attributed to the planar geometry of the C=N-N=C moiety.

identifier:JOS-xraystruct.27.75

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