metal-organic compounds
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 CuII 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.