title: Synthesis, spectroscopic characterization and crystal structure of novel NNNN-donor μ-bis(bidentate) tetraaza acyclic Schiff base ligands.
abstract: Novel NNNN-donor μ-bis(bidentate) tetraaza acyclic Schiff base ligands with different substituents (CF(3), N(CH(3))(2) or OH groups) were synthesized by the condensation reaction of triethylenetetramine with 4-substituted benzaldehydes. Triethylenetetramine tris(4-trifluoromethylbenzylidene) (TTFMB), triethylenetetramine tris(4-dimethylaminobenzylidene) (TTDMB) and triethylenetetramine tris(2,4-dihydroxybenzylidene) (TTDHB) were formed as N(4) donor ligands. The formation of a five-membered imidazolidine ring from the ethylenediamine backbone as a spacer-cumbridging unit gives rise to a new type of imidazolidine ligand. The structure of the TTFMB and TTDMB were determined by single crystal X-ray crystallography. The synthesized ligands have been characterized on the basis of the results of cyclic voltammetry (CV) and spectroscopic studies viz. FT-IR spectroscopy (FT-IR), mass spectroscopy (MS) and UV-Vis spectroscopy (UV-Vis).
authors.affiliation: Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Islamic Republic of Iran. habibi@chem.ui.ac.ir
authors.forename: Mohammad Hossein
authors.initials: MH
authors.lastname: Habibi
authors.forename: Elahe
authors.initials: E
authors.lastname: Shojaee
authors.forename: Gary S
authors.initials: GS
authors.lastname: Nichol
mesh_terms: D001372:Aza Compounds / Q000138:chemical synthesis / Q000737:chemistry; D001547:Benzaldehydes / Q000138:chemical synthesis / Q000737:chemistry*; D001597:Benzylidene Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D018360:Crystallography, X-Ray; D048289:Imidazolidines / Q000138:chemical synthesis / Q000737:chemistry*; D008024:Ligands; D013058:Mass Spectrometry; D008958:Models, Molecular; D012545:Schiff Bases / Q000138:chemical synthesis / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D014266:Trientine / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D001372:Aza Compounds; D001547:Benzaldehydes; D001597:Benzylidene Compounds; D048289:Imidazolidines; D008024:Ligands; D012545:Schiff Bases; D014266:Trientine