Coordination‐Polymeric Paracyclophane Complexes of Copper and Silver

Instead of η⁶ coordination to the outer side of cyclophanes, η² or η²/η³ coordination has been found for the complexes 1 and 2 of the coingage metals Cu¹ and Ag¹, respectively. In their crystal structures, each metal center bridges two cyclophane molecules. However, on account of the differing coordination of the counterion, screwlike chains are formed for 1, whereas layers are formed for 2. Upon exposure to air, compound 1 discolors and becomes electrically conducting. (Formula Presented.)