Syntheses, spectral, thermal and structural characterization of 2-hydroxyanilinium and 2-amino-3-hydroxy-pyridinium squarates

YEŞİLEL O. Z., Pasaoglu H., Yilan O. O., Buyukgungor O.

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES, vol.62, no.6, pp.823-828, 2007 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 62 Issue: 6
  • Publication Date: 2007
  • Journal Name: ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.823-828
  • Keywords: squaric acid, squarate salts, thermal analyses, CRYSTAL-STRUCTURE, SQUARIC ACID, AMINO-ACIDS, HYDROGENSQUARATE, MONOHYDRATE
  • Ondokuz Mayıs University Affiliated: No

Abstract

New salts of 2-hydroxyaniline and 2-amino-3-hydroxypyridine with squaric acid were synthesized and characterized by elemental analyses, IR spectroscopy and thermal analyses (TG, DTG and DTA). The crystal structures of bis(2-hydroxyanilinium) squarate, [(C6H8NO+)(2)(C4O4)(2-)] (1) and bis(2-amino-3-hydroxy-pyridinium) squarate dihydrate, [(C5H7N2O+)(2)(C4O4)(2-)]center dot 2 H2O (2) were determined by single crystal X-ray diffraction. Both compounds crystallize in the monoclinic system, space group P2(1)/c. The organic ammonium squarates decompose in two thermal steps.