Publication: Structural diversities and spectroscopic properties of bis and tris(1,10-phenanthroline)copper(II) complexes
Issued Date
2007-05-01
Resource Type
ISSN
02775387
Other identifier(s)
2-s2.0-34147142408
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Mahidol University
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SCOPUS
Bibliographic Citation
Polyhedron. Vol.26, No.7 (2007), 1459-1468
Suggested Citation
Sujittra Youngme, Nanthawat Wannarit, Chaveng Pakawatchai, Narongsak Chaichit, Eakasit Somsook, Urho Turpeinen, Ilpo Mutikainen Structural diversities and spectroscopic properties of bis and tris(1,10-phenanthroline)copper(II) complexes. Polyhedron. Vol.26, No.7 (2007), 1459-1468. doi:10.1016/j.poly.2006.11.036 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/24358
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Title
Structural diversities and spectroscopic properties of bis and tris(1,10-phenanthroline)copper(II) complexes
Abstract
The crystal structures of four new compounds containing bis and tris(1,10-phenanthroline)copper(II) complex units have been determined by X-ray crystallographic methods; [Cu(phen)3](S4O6)(S8) (1), [Cu(phen)3](BF4)2(2), [Cu(phen)2(OS2O7)] (3) and [Cu(phen)2(FBF3)](BF4) (4). The crystal structures of 1 and 2 are composed of discrete [Cu(phen)3]2+cations, (S4O6)2-and BF4-anions. The Cu(II) ion is octahedrally coordinated by the three phen ligands. As a consequence of the Jahn-Teller effect, the two axial Cu-N bonds are longer than the equatorial Cu-N bonds and the CuN6chromophores appear to be elongated rhombic octahedral with tetragonalities of 0.892 and 0.886 for 1 and 2, respectively. Complexes 3 and 4 consist of mononuclear units, the 5-coordinate Cu(II) environment being distorted square pyramidal (τ = 0.31) and distorted trigonal bipyramidal (τ = 0.66), respectively. The unidentate S2O82 -anion in 3 occupies the axial position, while the unidentate BF4-anion in 4 is coordinated in the trigonal plane. The crystal structures and their electronic properties including IR and EPR spectra are discussed and compared to other relevant complexes based on the Jahn-Teller effect. © 2006 Elsevier Ltd. All rights reserved.