CJCU

Chem. J. Chinese Universities ›› 1988, Vol. 9 ›› Issue (6): 618.

• Articles • Previous Articles     Next Articles

Isomer Seperation of Dibenzo-18-Crown-6 Nitration and Structure Determination of the Cis Product

Yang Guangdi1, Sun Yunxiu2, Zhang Huixiang2, Zhang Hui2   

  1. 1. Institute of Theoretical Chemistry of Jilin University, Changchun;
    2. Department of Chemistry of Jilin University, Changchun
  • Received:1986-12-05 Online:1988-06-24 Published:1988-06-24

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Abstract: Under the improved condition, the dibenzo-18-crown-6 can be nitrated with production rate over 90 per cent. In addition, we proposed a method by which the cis-dinitro-dibenzo-18-crown-6 can be easely separated from its trans isomer. By combining elemental analysis, infrared and X-ray diffraction results, the molecular and crystal structure of cis-dinitro-dibenzo-18-crown-6 has been determined. The crystals belong to monoclinic space group P21/n, with a= 15.985(7), 6 = 20.411(9), c = 8.173(4)Å, β=101.09(4)°, Z = 4. The structure was solved by direct methods and refined to convergence with final Rvalue of 0.067.

Key words: Cis-NDBC, Isomer seperation, Structure determination

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