Isolable arene sandwiched copper(<scp>i</scp>) pyrazolates

The π-acid/π-base adducts of {[3,5-(CF3)2Pz]Cu}3[Cu3] and benzene [Bz], mesitylene [Mes] and naphthalene [Nap] have been isolated. They form columnar structures of the type {[Bz][Cu3]2}∞, {[Mes][Cu3]}∞ and {[Nap][Cu3]}∞ in the solid state, and are luminescent.