Abstract
Reaction of K 3[Fe(CN) 6] with [Mn(salen)·H 2O]ClO 4·H 2O (salen: N, N′-ethylenebis(salicylideneiminato) dianion) affords a bimetallic heptanuclear complex cationic salt [{Mn(salen)·H 2O} 6Fe(CN) 6][Fe(CN) 6]·6H 2O. In the complex cation [{Mn(salen)·H 2O} 6Fe(CN) 6] 3+, the central [Fe(CN) 6] 3− unit is surrounded by six [Mn(salen)·H 2O] + moieties through Fe–C–N–Mn linkages with dimensions of Fe–C=1.941(5) Å, Mn–N=2.334(2) Å, Fe–C–N=177.7(2)° and Mn–N–C=150.7(1)°. The variable temperature magnetic susceptibilities, measured in the 5–300 K range, indicate the presence of a weak intracluster ferromagnetic interaction between Fe(III)( S=1/2) and Mn(III)( S=2) through cyano bridges.
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