Spectroscopic studies on charge-transfer complexes formed in the reaction of ferric (III) acetylacetonate with σ-and π-acceptors
SM Teleb, MS Refat - Spectrochimica Acta Part A: Molecular and …, 2004 - Elsevier
SM Teleb, MS Refat
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2004•ElsevierThe reaction of ferric (III) acetylacetonate (donor), Fe (acac) 3, with iodine as a σ-acceptor
and with other different π-acceptors have been studied spectrophotometrically at room
temperature in chloroform. The π-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 …
and with other different π-acceptors have been studied spectrophotometrically at room
temperature in chloroform. The π-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 …
The reaction of ferric(III) acetylacetonate (donor), Fe(acac)3, with iodine as a σ-acceptor and with other different π-acceptors have been studied spectrophotometrically at room temperature in chloroform. The π-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.
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