“…The tetranuclear copper motif, L 4 Cu 4 Cl 6 O, where L is a nitrogen-containing Lewis base ligand, is common. For instance, several structures have been reported in which L contains either an imidazole or substituted imidazole moiety (Clegg et al, 1988;Norman et al, 1989Erdonmez et al, 1990Atria et al, 1999;Corté s et al, 2006;Chiarella et al, 2009Chiarella et al, , 2010She et al, 2010) or a benzimidazole moiety (Tosik et al, 1991Zhang et al, 2003Jian et al, 2004;Li et al, 2011).…”