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

Yoshiyuki Sugahara*, Itaru Takaya, Jun Chiba, Kazuyuki Kuroda

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)95-99
Number of pages5
JournalJournal of Sol-Gel Science and Technology
Issue number1-3
Publication statusPublished - 1997


  • Al NMR spectroscopy
  • Aluminum sec-butoxide
  • C NMR spectroscopy
  • Oxalic acid
  • Polymerization

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • General Chemistry
  • Biomaterials
  • Condensed Matter Physics
  • Materials Chemistry


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