- Improved Synthesis and Crystal Structure of 7H-Dibenzanthracen-7-one
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An improved synthetic method gives pure 7H-dibenzanthracen-7-one, C21H12O, in a higher yield than those reported so far.The crystal structure has been determined by X-ray analysis.The space group is Pn21a, with unit cell dimensions of a=23.325(5), b=14.149(3), c=3.986(1) A, and Z=4.The structure was solved by the direct method and refined by the block-diagonal least-squares method to an R value of 0.044.The molecule is greatly distorted from the planar conformation because of an intramolecular steric repulsion between the hydrogen atoms.
- Fujisawa, Shoi,Oonishi, Isao,Aoki, Junji,Ohashi, Yuji,Sasada, Yoshio
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