title: Spectroscopic studies on charge-transfer complexes formed in the reaction of ferric(III) acetylacetonate with sigma- and pi-acceptors.
abstract: The reaction of ferric(III) acetylacetonate (donor), Fe(acac)3, with iodine as a sigma-acceptor and with other different pi-acceptors have been studied spectrophotometrically at room temperature in chloroform. The pi-acceptors used in this investigation are 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ), p-chloranil and 7,7',8,8'-tetracyanoquinodimethane (TCNQ). The results indicate the formation of 1:1 charge-transfer complexes with a general formula, [Fe(acac)3 (acceptors)]. The iodine complex was shown to contain the triiodide species, [Fe(acac)3]2I(+)I3-, based on the electronic absorptions as well as on the Far-infrared absorption bands characteristic for the non-linear triiodide species, I3-, with C2v symmetry. The proposed structure of this complex is further supported by thermal and middle infrared measurements.
authors.affiliation: Chemistry Department, Faculty of Science, Zagazig University, Zagazig, Egypt.
authors.forename: S M
authors.initials: SM
authors.lastname: Teleb
authors.forename: M S
authors.initials: MS
authors.lastname: Refat
mesh_terms: D004563:Electrochemistry; D004579:Electron Transport; D005290:Ferric Compounds / Q000737:chemistry*; D006885:Hydroxybutyrates / Q000737:chemistry*; D010422:Pentanones / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D005290:Ferric Compounds; D006885:Hydroxybutyrates; D010422:Pentanones; C049529:acetyl acetonate