title: Thermal, spectroscopic, and solvent influence studies on mixed-ligand copper(II) complexes containing the bulky ligand: Bis[N-(p-tolyl)imino]acenaphthene.
abstract: Four mixed-ligand copper(II) complexes containing the rigid bidentate nitrogen ligand bis[N-(p-tolyl)imino]acenaphthene (abb. p-Tol-BIAN) ligand are reported. These complexes, namely [Cu(p-Tol-BIAN)(2)](ClO(4))(2)1, [Cu(p-Tol-BIAN)(acac)](ClO(4)) 2, [Cu(p-Tol-BIAN)Cl(2)] 3 and [Cu(p-Tol-BIAN)(AcOH)(2)](ClO(4))(2)4 (where acac, acetylacetonate and AcOH, acetic acid) have been prepared and characterized by elemental analysis, spectroscopic, magnetic and molar conductance measurements. ESR spectra suggest a square planar geometry for complexes 1 and 2. In complexes 3 and 4, a distorted tetrahedral arrangement around copper(II) centre was suggested. Solvatochromic behavior of all studied complexes indicates strong solvatochromism of their solutions. The observed solvatochromism is mainly due to the solute-solvent interaction between the chelate cation and the solvent molecules. Thermal properties and decomposition kinetics of all complexes are investigated. The kinetic parameters (E, A, Delta H, Delta S and Delta G) of all thermal decomposition stages have been calculated using the Coats-Redfern and other standard equations.
authors.affiliation: Department of Chemistry, Mansoura University, Mansoura 35516, Egypt. uelayaan@kfu.edu.sa
authors.forename: Usama
authors.initials: U
authors.lastname: El-Ayaan
authors.forename: I M
authors.initials: IM
authors.lastname: Gabr
mesh_terms: D000073:Acenaphthenes / Q000737:chemistry*; D003300:Copper; D004553:Electric Conductivity; D004578:Electron Spin Resonance Spectroscopy; D008024:Ligands; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry; D012997:Solvents; D013055:Spectrophotometry, Infrared; D013816:Thermodynamics
chemical_list: D000073:Acenaphthenes; D008024:Ligands; D009942:Organometallic Compounds; D012997:Solvents; C522495:bis(N-(4-tolyl)imino)acenaphthene; D003300:Copper