From post

Monomer and cyclic tetramer of copper(II) complexes: Synthesis, characterization and crystal structure determination of Cu(dm4bt)Cl(Hipht) and \Cu(dm4bt)(H2O)(ipht)\(4)center dot 2H(2)O

, , , , и . POLYHEDRON, 29 (12): 2409-2416 (августа 2010)