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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 25, Number 6
BKCSDE 25(6)
June 20, 2004 

Crystal Structures and Characterization of Copper(II) Complexes of N,N,N\'N\'-Tetrakis(2-pyridylmethyl)-1,2-ethanediamine
Doo Cheon Yoon, Uk Lee, Chang Eon Oh*
Pentadentate copper(II) complex, Dinuclear copper(II) complex, Crystal structure, Tpen
The structure of [Cu(tpen)](ClO4)2 (tpen = N,N,N',N'-tetrakis(2-pyridylmethyl)-1,2-ethanediamine) has been identified by X-ray crystallography. The copper(II) ion is surrounded by two amine N atoms and three pyridine N atoms of the ligand, making a distorted trigonal-bipyramid. Among the six potential N donor atoms (two amine N and four pyridine N atoms), only one pyridine N atom remains uncoordinated. We examined structural changes on addition of Cl? to [Cu(tpen)]2+ (1). The addition of Cl? in methanol resulted in the formation of a novel dinuclear copper(II) complex [Cu2Cl2(tpen)](ClO4)2·H2O. The structure of the dinuclear complex was verified by X-ray crystallography. Each copper(II) ion in the dinuclear complex showed a distorted square planar geometry with two pyridine N atoms, one amine N atom and one Cl? ion.
796 - 800
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