Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Synthesis and X-Ray Structure of 25-Acetoxy-26,27,28-trimethoxycalix[4]arene

  • Park, Yeong Ja (Department of Chemistry, Sookmyng Women's University) ;
  • No Kwanghyun (Department of Chemistry, Sookmyng Women's University) ;
  • Song Boo-Hee (Department of Chemistry, Sookmyng Women's University) ;
  • Rhim Soo Kyung (Department of Chemistry, Sookmyng Women's University)
  • Published : 1994.12.20
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Abstract

25-Acetoxy-26,27,28-trimethoxycalix[4]arene was synthesized by the treatment of calix[4]arene trimethyl ether with acetyl chloride in the presence of NaH. The solution conformation was inferred as a partial cone conformation based on the $^1H$-and $^{13}C$ NMR spectra. The crystal structure has been determined by X-ray diffraction method. The crystals are monoclinic, space group $P2_1$/n, a=8.186 (1), b=17.137 (2), c=19.878 (3) ${\AA}$, ${\beta}$=95.67 (1)$^{\circ}$, Z=4, V=2774.90 ${\AA}^3$, $D_c$= 1.22 g $cm^{-3}$, $D_m$=1.23 g $cm^{-3}$. The intensity data were collected on an Enraf-Noninus CAD-4 Diffractometer with a graphite monochromated $Cu-K{\alpha}$ radiation. The structure was solved by direct method and refined by full-matrix least-squares methods to a final R value of 0.054 for 3675 observed reflections. The molecule possesses a partial cone conformation with one flattened phenyl unit, in which one anisol ring, distal to the ester ring, is inverted. The acetoxyphenyl ring is flattened.

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References

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