Synthesis, characterization, crystal structures and photophysical properties of copper(I) complexes containing 1,1′-bis(diphenylphosphino)ferrocene (B-dppf) in doubly-bridged mode

► CuX:B-dppf (1:1). ► X-ray crystal structure of [Cu2(μ-Br)2(κ2-P,P-B-dppf)2] and[Cu2(μ-η1-CN)2(κ2-P,P-B-dppf)2]. ► 3c-2e system in [Cu2(μ-η1-CN)2(κ2-P,P-B-dppf)2]. ► Photophysical properties of copper(I) complexes.