title: Synthesis, spectroscopic characterization and X-ray structure of [1,2a]benzimidazol-2-yl amidine.
abstract: [1,2a]Benzimidazol-2-yl amidine was synthesized by adding cyclopentanamine to iminoester in ethanol. The structure of amidine 1 was characterized by IR, 1H NMR, 1H-1H NOESY, 13C NMR, DEPT, XHCOR spectra, thermogravimetric analysis (TGA), differential thermal analysis (DTA), differential scanning calorimetry thermograms (DSC), elementary analysis as well as by X-ray diffraction. The single crystals suitable for X-ray measurement were obtained by recrystallization at room temperature. The amidine group of a model was found to have Z configuration in the crystal. This compound crystallizes in a P2(1)/n monoclinic unit cell with parameters a=12.679(2) Å, b=8.468(3) Å, c=13.108(2) Å, β=96.538(2)°, V=1398.2 Å3 and Z=4.
authors.affiliation: Laboratory of Physics of Lamellaires Materials and Hybrids Nanomaterials, University of Carthage, Faculty of Science of Bizerte, Zarzouna 7021, Bizerte, Tunisia.
authors.forename: A
authors.initials: A
authors.lastname: Hajri
authors.forename: W
authors.initials: W
authors.lastname: Smirani
authors.forename: R
authors.initials: R
authors.lastname: Abderrahim
mesh_terms: D000578:Amidines / Q000138:chemical synthesis*; D001562:Benzimidazoles / Q000737:chemistry*; D002152:Calorimetry, Differential Scanning; D003460:Crystallization; D018360:Crystallography, X-Ray; D004055:Differential Thermal Analysis; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D013055:Spectrophotometry, Infrared; D014961:X-Ray Diffraction
chemical_list: D000578:Amidines; D001562:Benzimidazoles; C031000:benzimidazole