Mössbauer and magnetic studies on the spin states of mono- and binuclear iron(III) complexes with quinquedentate ligand methyl-substituted pyridine and bridged by pyrazine or bis(pyridine) compounds

Wei, Ho‐Hsiang; Sheu, J. F.

doi:10.1007/bf02396485

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…11 The situation regarding the asymmetric H 2 salpet ligand is very similar. There are reports on mononuclear SCO compounds [Fe(salpet)L]BPh 4 (L = pyridine, 3-methyl-pyridine, 4-methylpyridine, 3,4-dimethyl-pyridine), 12 dinuclear compounds bridged through N-heterocyclic derivatives [(salpet)Fe(μ-L)Fe-(salpet)](BPh 4 ) 2 (L = pyrazine, 4,4′-bipyridine, 1,2-bis(4-pyridyl)ethylene), 12 dinuclear compounds bridged via the cyanido ligand [(Rsalpet)Fe(μ-CN)Fe(Rsalpet)]A•xsolv (A = ClO 4 or BPh 4 ) 13 and several polynuclear compounds bridged through diamagnetic metallocyanides [Fe(saldpt){μ-Fe(CN) 5 (NO)}Fe-(saldpt)]•xsolv, 13 [{Fe(salpet)} 4 {μ-Sn(CN) 4 }]Cl 4 , 14 [{Fe(salpet)} 6 -{μ-Sb(CN) 4 }]Cl 5 15 and [{Fe(salpet)} 6 {μ-Fe(CN) 6 }]Cl 2 . 16 An analogous H 2 napet ligand (N,N′-bis(2-hydroxynaphthyliden)-1,6diamino-3-azahexane) was prepared by the substitution of salicylaldehyde for 2-hydroxy-1-naphthaldehyde, and the first iron(III) SCO compounds with coordinated pseudohalides [Fe-(napet)A]•xsolv (A = NCS, NCSe, NCO, N 3 ) were also reported.…”

Section: Introductionmentioning

confidence: 99%

5-Aminotetrazole induces spin crossover in iron(iii) pentadentate Schiff base complexes: experimental and theoretical investigations

Herchel

Trávníček

2013

Dalton Trans.

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A series of novel mononuclear iron(III) complexes [Fe(saldpt)(atz)] (1) and [Fe(Rsalpet)(atz)] (2a-d) involving 5-aminotetrazole (Hatz) and pentadentate Schiff base ligands (H2saldpt = N,N'-bis(2-hydroxybenzyliden)-1,7-diamino-4-azaheptane, H2salpet = N,N'-bis(2-hydroxybenzyliden)-1,6-diamino-3-azahexane, H25Cl-salpet = N,N'-bis(5-chloro-2-hydroxybenzylidene)-1,6-diamino-3-azahexane, H25Br-salpet = N,N'-bis(5-bromo-2-hydroxybenzylidene)-1,6-diamino-3-azahexane and H23,5Br-salpet = N,N'-bis(3,5-dibromo-2-hydroxybenzylidene)-1,6-diamino-3-azahexane) was prepared and characterized by elemental analysis, FTIR spectroscopy, mass spectrometry, single crystal X-ray analysis, magnetic measurements and (57)Fe Mössbauer spectroscopy. In contrast to the high-spin magnetic properties of [Fe(saldpt)(atz)] (1), the complexes [Fe(Rsalpet)(atz)] (2a-d) undergo spin crossover with critical temperatures above 416 K. Furthermore, DFT calculations with the B3LYP functional were employed to investigate the effect of the conductor-like screening model (COSMO) and van der Waals corrections (VDW) as well as relativistic effects with the scalar relativistic second-order Douglas-Kroll-Hess Hamiltonian (DKH2) on low-spin and high-spin molecular geometries and thus on spin crossover parameters (enthalpy, entropy and critical temperature).

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Section: Introductionmentioning

confidence: 99%

5-Aminotetrazole induces spin crossover in iron(iii) pentadentate Schiff base complexes: experimental and theoretical investigations

Herchel

Trávníček

2013

Dalton Trans.

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Mössbauer and Magnetic Studies on the Spin‐State Transitions of Iron Complexes

Wei

1992

J Chinese Chemical Soc

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Mössbauer and magnetic studies on the spin‐state transitions in various complexes of iron(II) and iron(III) ions have received considerable attention. The present account deals with some examples of the effects of intraligand substitution and sample size on the spin‐state transitions of 5T2 ↔ 1A1 for iron(II) and 6A1 ↔ 2T2 for Iron(III)‐complexes. A new instance of 3T1 ↔ 5T2 spin‐crossover Fe(II)‐complex is reported.

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Mössbauer and magnetic studies on the spin states of mono- and binuclear iron(III) complexes with quinquedentate ligand methyl-substituted pyridine and bridged by pyrazine or bis(pyridine) compounds

Cited by 2 publications

References 7 publications

5-Aminotetrazole induces spin crossover in iron(iii) pentadentate Schiff base complexes: experimental and theoretical investigations

5-Aminotetrazole induces spin crossover in iron(iii) pentadentate Schiff base complexes: experimental and theoretical investigations

Mössbauer and Magnetic Studies on the Spin‐State Transitions of Iron Complexes

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