Two TEPA-Copper(II) Complexes {TEPA is Tris[2-(2-pyridyl)ethyl]amine}

In both the title compounds, aqua{tris[2-(2-pyridyl)ethyl]amine-N,N',N'',N'''}copper(II) bis (trifluoromethanesulfonate) monohydrate, [Cu(C₂₁H₂₄N₄)(H₂O)](CF₃SO₃)₂.H₂O, (1), and (acetato-O){tris[2-(2-pyridyl)ethyl]amine-N,N',N'',N'''}copper(II) hexafluorophosphate, [Cu(C₂H₃O₂)(C₂₁H₂₄N₄)]PF₆, (2), the Cu^II atom is pentacoordinate and the geometry is described as square-based pyramidal. Three of the atoms in the equatorial plane remain unchanged, i.e. N1, N2 and N3 from the tripodal amine and two pyridine groups, respectively, while the fourth ligand is a water molecule in (1) and an acetate group in (2). The axial position is occupied in both cases by the N4 atom of the third pyridine ring.

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