Dinuclear molybdenum tetracarbonyl complexes of tetradentate nitrogen Ligands and intermolecular hydrogen bonding in the crystal structure of N,N '-bis-[1-(pyridin-2-yl)ethylidene]-ethane-1,2-diamine

Mentes A., Sezek S., HANHAN M. E., Buyukgungor O.

TURKISH JOURNAL OF CHEMISTRY, vol.31, no.6, pp.667-676, 2007 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 31 Issue: 6
  • Publication Date: 2007
  • Journal Name: TURKISH JOURNAL OF CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.667-676
  • Keywords: dinuclear, intermolecular H-bonding, molybdenum, polyimines, Schiff base, tetracarbonyl, SCHIFF-BASE LIGANDS, COPPER(II) COMPLEX, POLYMERIZATION, CATALYSTS
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

Multidentate N-ligands (Schiff bases) were prepared by the condensation of 2-acetylpyridine or 2-benzoylpyridine, and 1,2-diaminoethane or 1,6-diaminohexane (2:1 ratio) in ethanol. These ligands were reacted with Mo(CO)(6) to obtain dinuclear metal tetracarbonyl compounds. Both terminal amine groups were seen to form imines from the reaction of mono-ketones with diamines in 2:1 or 1:1 ratios. The structures of these ligands and metal complexes were characterized by elemental analysis, and FT-IR, H-1-NMR, C-13-NMR, and LC-MS spectral techniques. N,N '-bis[1-(pyridin-2-yl)ethylidene]ethane-1,2-diamine, which was obtained by the reaction of 2-acetylpyridine and 1,2-diaminoethane, was also characterized by single crystal X-ray structure analysis. The crystal packing is stabilized by intermolecular H-bonding and p-p interactions.