Organometallic–Organic Hybrid Polymers Assembled from Pentaphosphaferrocene, Bipyridyl Linkers, and Cu^I Ions

A multicomponent approach of the P_n ligand complex [Cp*Fe(η⁵-P₅)] (1: Cp* = η⁵-C₅Me₅) with the ditopic organic linkers 4,4′-bipyridine (2) or trans-1,2-di(pyridine-4-yl)ethene (3) in the presence of Cu^I salts of the anions [BF₄]^– and [PF₆]^– or the coordinating anion Br^–, leads to the formation of four novel organometallic–organic hybrid polymers: the cationic 1D polymeric compounds [Cu₄{Cp*Fe(µ₃,η^5:1:1-P₅)}₂(µ,η^1:1-C₁₀H₈N₂)₄(CH₃CN)₄]_n[BF₄]_4n (4) and [Cu₄{Cp*Fe(µ₃,η^5:1:1-P₅)}₂(µ,η^1:1-C₁₀H₈N₂)₄(CH₃CN)₄]_n[PF₆]_4n (5) as well as the unique neutral threefold 2D → 2D interpenetrated networks [Cu₂Cl₂{Cp*Fe(µ₃,η^5:1:1-P₅)}(µ,η^1:1-C₁₂H₁₀N₂)]_n (6) and [Cu₂Br₂{Cp*Fe(µ₃,η^5:1:1-P₅)}(µ,η^1:1-C₁₀H₈N₂)]_n (7).