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Polymerization Reactions in an Al(OBus)3-(COOH)2 System

  • Yoshiyuki Sugahara
  • Itaru Takaya
  • Jun Chiba
  • Kazuyuki Kuroda
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Abstract

Reactions in an Al(OBus)3-(COOH)2 (OA)-tetrahydrofuran (THF)/(CD3)2SO (DMSO-d6) system (Al(OBus)3: THF : DMSO-d6: OA = 1 : 5 : 5 : x, x = 0.01 –3) were studied, without the addition of water and the process was monitored by NMR. When x ≤ 0.3, homogeneous solutions were obtained, whereas white precipitates formed with x ≥ 0.7. The formation of sec-butyl alcohol was evident with x ≥ 0.6, indicating that oxalate groups coordinate to aluminum to release sec-butyl alcohol. 13C NMR spectra of the solutions after 1 day suggest the presence of polymeric species if 0.03 ≤ x ≤ 0.6. The addition of a small amount of water resulted in the formation of a white precipitate (Al(OBus)3: THF : DMSO-d6 : OA : H2O = 1 : 5 : 5 : 0.3 : y,y = 0.03–0.3), indicating that water, possibly formed by esterification in the Al(OBus)3-OA-THF/DMSO-d6 system, does not take a major role in the present system.

aluminum sec-butoxide oxalic acid 13C NMR spectroscopy 27Al NMR spectroscopy polymerization 

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Copyright information

© Kluwer Academic Publishers 1997

Authors and Affiliations

  • Yoshiyuki Sugahara
  • Itaru Takaya
  • Jun Chiba
  • Kazuyuki Kuroda

There are no affiliations available

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