Acta Phys. -Chim. Sin. ›› 2003, Vol. 19 ›› Issue (01): 75-78.doi: 10.3866/PKU.WHXB20030117

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Synthesis and Crystal Structure of 4,4’-Oxobis(propham)

Wang Wen-Zhi;Fan Neng-Ting   

  1. Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091
  • Received:2002-04-12 Revised:2002-06-06 Published:2003-01-15
  • Contact: Fan Neng-Ting

Abstract: The title compounds 4,4’-oxobis(propham) (Ⅰ) (C20H24N2O5, Mr=372.41) was synthesized by the addition reaction of the corresponding 4,4’-oxobisphenyl diisocyanate with isopropanol. The crystal structure was determined by X-ray diffraction method. The crystal is of triclinic system, space group P1 with a=0.85107(17), b=0.91164(18), c=1.45701(3) nm, α=80.44(3)°, β=85.25(3)°, γ= 62.88(3)°, V=0.9922(3) nm3, Z=2, Dc=1.247 g•cm-3,μ(Mo Kα)=0.90 cm-1,F(000)=396, R=0.0520 , wR=0.1434 for 4336 observed reflections with [I >2σ(I)]. X-ray analysis reveals that interatomic distances for O(2)-C(7) is 0.12142(19), O(4)-C(17) is 0.12136(18) nm, this obviously shows the formation of C=O double bonds and distances N1…O4=0.295310 nm and N2…O2=0.2941 nm show the formation of a weak hydrogen bonds.

Key words: 4,4’-Oxobis(propham), Synthesis, Crystal structure