A cyanide-bridged FeIII – MnII heterobimetallic one-dimensional coordination polymer: synthesis, crystal structure, experimental and theoretical magnetism investigation

A new cyanide-bridged FeIII – MnII heterobimetallic coordination polymer (CP), namely catena-poly[[[N,N ′ -(1,2-phenylene)bis(pyridine-2-carboxamidato)- κ 4N,N ′ ,N ′ ′ ,N ′ ′ ′ ]iron(III)]- μ -cyanido- κ 2C:N-[bis(4,4 ′ -bipyridine- κ N)bis(methanol- κ O)manganese(II)]- μ -cyanido- κ 2N:C], {[FeMn(C18H12N4O2)(CN)2(C10H8N2)2(CH3OH)2]ClO4}n, (1), was prepared by the self-assembly of the trans-dicyanidoiron(III)-containing building block [Fe(bpb)(CN)2] − [bpb2 − = N,N ′ -(1,2-phenylene)bis(pyridine-2-carboxamidate)], [Mn(ClO4)2] · 6H2O and 4,4 ′ -bipyridine, and was structurally characterized by elemental analysis, IR spectroscopy, single-crystal X-ray crystallography and powder X-ray diffraction (PXRD). Single-crystal X-ray diffraction analysis shows that CP 1 possesses a cationic linear chain structure consisting of alternating cyanide-bridged Fe – Mn units, with free perchlorate as the charge-balancing anion, which can be further extended into a two-dimensional supramolecular sheet structure via inter-chain π – π interactions between the 4,4 ′ -bipyridine ligands. Within the chain, each MnII ion is six-coordinated by an N6 unit and is involved in a slightly distorted octahedral coordination geometry. Investigation of the magnetic properties of 1 reveals an antiferromagnetic coupling between the cyanide-bridged FeIII and MnII ions. A best fit of the magnetic susceptibility based on the one-dimensional alternating chain model leads to ...

Source: Acta Crystallographica Section C - October 3, 2019 Category: Chemistry Authors: Lan, W. Zhou, Z. Li, J. Dou, Y. Hao, X. Yang, L. Liu, H. Li, D. Liu, Q. Zhang, D. Tags: one-dimensional coordination polymer cyanide bridge crystal structure magnetic properties iron(III) manganese(II) heterobimetallic research papers Source Type: research