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[摘要]：The effective syntheses of diaza-analogue of fluorenone and spirobifluorene with N=N bond has been conducted with the using of ninhydrin and corresponding acetyl derivatives of arenes. Single-crystal X-ray diffraction of 2-(spirobifluoren-2-yl)- 3,4-dizaspirobifluorene (4a) proved the conformation. |
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