Ammonium tris-oxalatoferrate(III) as a source of metalloligand in direct synthesis of Cu/Fe coordination polymer

Structural, Electrical, and Magnetic Versatility of the Oxalate-Based [CuFe] Compounds Containing 2,2′:6′,2″-Terpyridine: Anion-Directed Synthesis

“…The iron­(III) ion from the bridging [Fe­(C 2 O 4 ) 3 ] 3– building block displays an approximately octahedral coordination geometry, involving six O atoms from three oxalate groups. The values of the Fe–O bond lengths are in the relatively good agreement with literature data . Selected bond distances and angles for 3 are listed in Table S6.…”

“…All absorption bands observed in the IR are described in the Experimental Section of the Supporting Information. The absorption bands corresponding to the stretching vibrations of the coordinated [bis­(bidentate) and bis­(bidentate)–bis­(monodentate)] and uncoordinated [bidentate and bidentate–monodentate] CO groups of the oxalate ligands , for all compounds are summarized in Table S9. The terminal and bridging Cu–Cl stretching vibrations in compound 1 appear at 324 and 308 cm –1 , respectively …”

“…The iron(III) ion from the bridging [Fe(C 2 O 4 ) 3 ] 3− building block displays an approximately octahedral coordination geometry, involving six O atoms from three oxalate groups. The values of the Fe−O bond lengths are in the relatively good agreement with literature data 34. Selected bond distances and angles for 3 are listed in TableS6.Uncommonly, three different bridging modes of the oxalate group are observed in compound 3: bidentate-monodentate [μ-1,1,2] and bidentate-monodentate [μ-1,2,3] between copper(II) and iron(III) centers and bis(bidentate)−bis-(monodentate) [μ 4-1,1,2,3,3,4] between four copper centers (Scheme S1a) 16.…”