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The crystal structure of the novel hydrated Cu II salt, [Cu( L )(H 2 O) 2 ]Cl 2 ·4H 2 O ( L = 3,14-diethyl-2,6,13,17-tetra-aza-tri-cyclo-[16.4.0.0 7,12 ]docosane, C 22 H 44 N 4 ) has been determined using synchrotron radiation. The asymmetric unit contains one half of the [Cu( L )(H 2 O) 2 ] 2+ cation (completed by crystallographic inversion symmetry), one chloride anion and two lattice water mol-ecules. The copper(II) atom exists in a tetra-gonally distorted octa-hedral environment with the four N atoms of the macrocyclic ligand in equatorial and two O atoms from water mol-ecules in axial positions. The latter exhibit a long axial Cu-O bond length of 2.7866 (16) Å due to the Jahn-Teller distortion. The macrocyclic ring adopts a stable trans -III conformation with typical Cu-N bond lengths of 2.0240 (11) and 2.0441 (3) Å. The complex is stabilized by hydrogen bonds formed between the O atoms of coordinated water mol-ecules and the NH groups as donors, and chloride anions as acceptors. The chloride anions are further connected to the lattice water solvent molecules through O-H⋯Cl hydrogen bonds, giving rise to a three-dimensional network structure.

Crystal structure of diaqua(3,14-diethyl-2,6,13,17-tetraazatricyclo[16.4.0.07,12]docosane)copper(II) dichloride tetrahydrate

Crystal structure of diaqua(3,14-diethyl-2,6,13,17-tetraazatricyclo[16.4.0.0^7,12]docosane)copper(II) dichloride tetrahydrate