Crystal structure of trans-(1,8-dibutyl-1,3,6,8,10,13-hexa­aza­cyclo­tetra­decane-κ(4) N (3),N (6),N (10),N (13))bis­(perchlorato-κO)copper(II) from synchrotron data

The structure of the title compound, [Cu(ClO(4))(2)(C(16)H(38)N(6))] has been determined from synchrotron data, λ = 0.62988 Å. The asymmetric unit comprises one half of the Cu(II) complex as the Cu(II) cation lies on an inversion center. It is coordinated by the four secondary N atoms of the macrocyclic ligand and the mutually trans O atoms of the two perchlorate ions in a tetra­gonally distorted octa­hedral geometry. The average equatorial Cu—N bond length is significantly shorter than the average axial Cu—O bond length [2.010 (4) and 2.569 (1) Å, respectively]. Intra­molecular N—H⋯O hydrogen bonds between the macrocyclic ligand and uncoordinating O atoms of the perchlorate ligand stabilize the mol­ecular structure. In the crystal structure, an extensive series of inter­molecular N—H⋯O and C—H⋯O hydrogen bonds generate a three-dimensional network.