African Journal of
Pure and Applied Chemistry

  • Abbreviation: Afr. J. Pure Appl. Chem.
  • Language: English
  • ISSN: 1996-0840
  • DOI: 10.5897/AJPAC
  • Start Year: 2007
  • Published Articles: 363

Full Length Research Paper

Preparation, structural and thermal studies of boroxine adducts having aryl boronic acids and pyrazoles

Hezil Hassan
  • Hezil Hassan
  • Department of Chemistry, Iran University of Science and Technology, Narmak, 16846-13114, Tehran, Iran.
  • Google Scholar

  •  Received: 02 April 2016
  •  Accepted: 27 May 2016
  •  Published: 31 August 2016


Four new boroxine adducts ((B3O3(Ph)3PzH) (1), (B3O3(Ph)3(PztBu,iPrH)2) (2), (B3O3(PhF2)3PzH). PzH (3) and (B3O3(PhF2)3(PztBu,iPrH)2) (4)) using phenylboronic acid, 3,5-difluorophenylboronic acid, 1H-pyrazole (PzH) and 3-tert-butyl-5-isopropyl pyrazole (PztBu,iPrH) were prepared and characterized by elemental analysis, IR, 1H-NMR and X-ray diffraction. The crystallographic study reveals that PzH and PztBu,iPrH are bonded to boroxine molecule through B-N dative bond. It also demonstrates the different type of hydrogen bond interactions between adjacent molecules. The thermal stability of these adducts was investigated by TGA.

Key words: Boroxine, crystal structures, hydrogen bonding, thermal study.