Syntheses, structures, and magnetic characterizations of cyanide-bridged Fe IIIMn III chains constructed by mer-Fe(iii)tricyanide and Mn(iii) Schiff bases: Magnetostructural relationship

In Young Yoo, Dae Won Ryu, Jung Hee Yoon, Ah Ram Sohn, Kwang Soo Lim, Beong Ki Cho, Eui Kwan Koh, Chang Seop Hong

Research output: Contribution to journalArticle

32 Citations (Scopus)


Five Fe(iii)Mn(iii) bimetallic compounds [Fe(iqc)(CN) 3][Mn(5- Xsalen)]·pMeOH·qMeCN·rH 2O [Hiqc = N-(quinolin-8-yl)isoquinoline-1-carboxamide; salen = N,N′- ethylenebis(salicylideneiminato) dianion; X = H(2), F(3, 3a), Cl(4), Br(5)] were prepared by assembling a newly designed mer-Fe tricyanide (Ph 4P)[Fe(iqc)(CN) 3]·0.5H 2O (1) and the respective Mn Schiff bases Mn(5-Xsalen) +. Compounds 2-4 show linear chain structures in which trans-positioned cyanides of the Fe precursor bridge neighbouring Mn atoms, while 5 is a zigzag chain coordination polymer where two cyanide groups of the precursor in the cis mode act as bridges. The structural change from linear to zigzag may arise from the size effect of the halogens. The reversible structural transformation occurs between 3 and 3a upon the solvation-desolvation protocol and the corresponding magnetic behaviours are affected. Furthermore, in 4 and 5, the helical chains are established through hydrogen bonding of solvent molecules. From a magnetostructural point of view, within the linear chain system, the ferromagnetic coupling in 2, contrary to antiferromagnetic interactions in 3-4, is associated with the large torsion angle of C eq-Fe-Mn-N(O) eq (eq = equatorial) as well as almost the linear Mn-NC angle.

Original languageEnglish
Pages (from-to)1776-1785
Number of pages10
JournalDalton Transactions
Issue number6
Publication statusPublished - 2012 Feb 14


ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this