Cyanide-bridged feiii-mniii bimetallic complexes with dimeric and chain structures constructed from a newly made mer-fe tricyanide: structures and magnetic properties

Jae Il Kim, Hyun Young Kwak, Jung Hee Yoon, Dae Won Ryu, In Young Yoo, Namgeun Yang, Beong Ki Cho, Je Geun Park, Hyosug Lee, Chang Seop Hong

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Abstract

Four cyanide-linked FeIII-MnIII complexes were prepared by reacting Mn Schiff bases with a new molecular precursor (PPh 4)[Fe(qcq)(CN)3] [1; qcq ) 8-(2-quinolinecarboxamido) quinoline anion]. They include a dimeric molecule, [Fe(qcq)(CN) 3][Mn(3-MeOsalen)(H2O)] · 2H2O [2· 2H2O; 3-MeOsalen ) N,N′-ethylenebis(3- methoxysalicylideneiminato) dianion], and three 1D zigzag chains, [Fe(qcq)(CN)3][Mn(5-Clsalen)] · 3H2O [3 · 2MeOH; 5-Clsalen ) N,N'- ethylenebis(5-chlorosalicylideneiminato) dianion], [Fe(qcq)(CN)3][Mn(5-Brsalen)] · 2MeOH [4 · 2MeOH; 5-Brsalen ) N,N′-ethylenebis(5-bromosalicylideneiminato) dianion], and Fe(qcq)(CN)3][Mn(salen)] · MeCN ·H2O [5 · MeCN; salen ) N,N′-ethylenebis(salicylideneiminato) dianion]. The complexes consist of extensive hydrogen bonding and π-π stacking interactions, generating multidimensional structures. Magnetic studies demonstrate that antiferromagnetic couplings are operative between FeIII and MnIII centers bridged by cyanide ligands. On the basis of an infinite chain model, magnetic coupling parameters of 2-5 range from -9.3 to -14.1 cm -1. A long-range order is observed at 2.3 K for 3 and 2.2 K for 4, while compound 5 shows spin glass behavior possibly coupled with magnetic ordering.

Original languageEnglish
Pages (from-to)2956-2966
Number of pages11
JournalInorganic Chemistry
Volume48
Issue number7
DOIs
Publication statusPublished - 2009 Apr 17

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ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry

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