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 language | English |
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Pages (from-to) | 2956-2966 |
Number of pages | 11 |
Journal | Inorganic Chemistry |
Volume | 48 |
Issue number | 7 |
DOIs | |
Publication status | Published - 2009 |
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry