catena-poly[[[(2,2′-bipyridine-2κ²N,N′)-μ-cyanido-1:2κ²N:C-cyanido-2κC-tris(methanol-1κO)(nitrato-1κ²O,O′)iron(II)yttrium(III)]-di-μ-cyanido-1:2′κ²N:C;2:1′κ²C:N] methanol solvate hemihydrate]

Abstract

The title complex, {[FeIIYIII(CN)4(NO3)(C10H8N2)(CH3OH)3]·CH3OH·0.5H2O}n, is built up of ladder-like chains oriented along the c axis. Each ladder consists of two strands based on alternating FeII and YIII ions connected by cyanide bridges. Two such parallel chains are connected by additional cyanide anions (the ‘rungs’ of the ladder), which likewise connect FeII and YIII ions, such that each [Fe(bipy)(CN)4]2− (bipy is 2,2′-bipyridine) unit coordinates with three YIII ions and each YIII ion connects with three different [Fe(bipy)(CN)4]2− units. The FeII atom is six-coordinated in a distorted octa­hedral geometry and the YIII atom cation is eight-coordinated in a distorted dodeca­hedral environment. The uncoordinated methanol solvent mol­ecules are involved in hydrogen-bonding inter­actions with the one terminal cyanide group and a coordinated methanol mol­ecule from another [YIII(NO3)(CH3OH)3]2+ unit. Adjacent ladder-like chains are also held together by hydrogen bonds between the terminal cyanide ligands of the [Fe(CN)4(bipy)]2− units in one chain and the OH donors of CH3OH ligands from [YIII(NO3)(CH3OH)3] units in neighboring chains. The water molecule exhibits half-occupation.