A one-dimensional copper(ii) coordination polymer containing [Fe(pytpy)2]2+ (pytpy = 4′-(4-pyridyl)-2,2′:6′,2″-terpyridine) as an expanded 4,4′-bipyridineligand: a hydrogen-bonded network penetrated by rod-like polymers

Abstract

The one-dimensional coordination polymer [{(H₂O)(NO₃)₂CuFe(1)₂}₂(NO₃)₄·2.15MeCN·5.85H₂O]_n assembles when the pendant pyridine donors in [Fe(1)₂]²⁺ (1 = 4′-(4-pyridyl)-2,2′:6′,2″-terpyridine) are treated with Cu(NO₃)₂·3H₂O, exemplifying [Fe(1)₂]²⁺ as an expanded 4,4′-bipyridine ligand. In the solid state, the polymer chains are threaded through hydrogen-bonded macrocycles comprising coordinated and non-coordinated water molecules and nitrate ions, the macrocycles being motifs within interconnected sheets in the structure.