Acta Phys. -Chim. Sin. ›› 1989, Vol. 5 ›› Issue (02): 141-144.doi: 10.3866/PKU.WHXB19890203

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THE STRUCTURAL EFFECT OF POLYPHENOXY BENZNE COMPOUNDS——THE CRYSTAL STRUCTRE OF 1,4-BIPHENOXYBENZENE AND 1,4-BIS (4-METHOXYPHENOXY) BENZENE

Liu Yuming; Guo Fang; Dai Cuichen; Chen Zhendong; Hong Shunian   

  1. Institute of Chemistry; Academia Sinica; Beijing, Department of Chemistry; Zhengzhou; University; Zhengzhou
  • Received:1987-07-27 Revised:1988-02-26 Published:1989-04-15
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Abstract:

The Crystal structure of 1,4-Biphenoxybenzene (Ⅰ) and 1,4-Bis (4-Methoxyphenoxy) benzene (Ⅱ) have been determined by X-ray diffraction method. For compound (Ⅰ) , the space group is P2_1/c; Its cell parameters are:a=5.876(2), b=7.832(2),c=6.5455(6)nm; β=95.33(3)~0; z=2.For compound (Ⅱ), the space group is Pcab; Its cell parameters are:a=6.017(1),b=7.577(1), c=3.6404 (5)nm;z=4.
The bond lengths,bond angles and molecular conformation indicate that:in these polyphenoxy benzene systems the conjugative polarization effect can not pass through the oxygen bridge to cover the whole molecule,
Such a strutctural feature explaines its small slope of the homologous line for absorption peaks of polyphenoxy benzene series.