Copper(I) and copper(II) complexes of an ethylene cross-bridged cyclam

The preparation and crystal structures of (4,11-dibenzyl-1,4,8,11-tetraazabicyclo[6.6.2]hexadecane-kappa(4)N)copper(I) hexafluorophosphate, [Cu(C26H38N4)]PF6, and acetonitrile (4,11-dibenzyl-1,4,8,11-tetraazabicyclo[6.6.2]hexadecane-kappa(4)N)-copper(II) bis(hexafluorophosphate), [Cu(C2H3N)(C26H38N4)](PF6)(2), are described. The Cu-I ion is tetracoordinated in a very distorted tetrahedron, while the Cu-II analogue is pentacoordinated in a square pyramid.