Synthesis, structure, and spin crossover above room temperature of a mononuclear and related dinuclear double helicate iron(ii) complexes.

@article{Hagiwara2016SynthesisSA,
  title={Synthesis, structure, and spin crossover above room temperature of a mononuclear and related dinuclear double helicate iron(ii) complexes.},
  author={Hiroaki Hagiwara and Tomoko Tanaka and Shiori Hora},
  journal={Dalton transactions},
  year={2016},
  volume={45 43},
  pages={
          17132-17140
        }
}
A mononuclear iron(ii) complex, [FeII(L1Me)2](PF6)2 (1), and a related dinuclear one, [Fe(L2C2)2](PF6)4·5H2O·MeCN (2), were prepared, where L1Me is a tridentate N3 coordinating Schiff-base ligand, 1-methyl-1,2,3-triazol-4-yl-methylideneamino-2-ethylpyridine, and L2C2 is a dimeric form ligand of L1Me, 1,1'-(1,2-ethanediyl)bis-1,2,3-triazol-4-yl-methylideneamino-2-ethylpyridine, and their magnetostructural relationships were investigated. Mononuclear 1 shows a gradual one-step spin crossover (SCO… 
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Iron(II) Spin Crossover Complex with the 1,2,3-Triazole-Containing Linear Pentadentate Schiff-Base Ligand and the MeCN Monodentate Ligand
A mononuclear iron(II) complex bearing the linear pentadentate N5 Schiff-base ligand containing two 1,2,3-triazole moieties and the MeCN monodentate ligand, [FeIIMeCN(L3-Me-3Ph)](BPh4)2·MeCN·H2O (1),…
High-temperature Spin Crossover of a Solvent-Free Iron(II) Complex with the Linear Hexadentate Ligand [Fe(L2-3-2Ph)](AsF6)2 (L2-3-2Ph = bis[N-(1-Phenyl-1H-1,2,3-triazol-4-yl)methylidene-2-aminoethyl]-1,3- propanediamine)
A novel mononuclear iron(II) complex with a linear hexadentate N6 ligand, containing two 1,2,3-triazole moieties, [Fe(L2-3-2Ph)](AsF6)2 (1), was synthesized (L2-3-2Ph =…
High-Temperature Wide Thermal Hysteresis of an Iron(II) Dinuclear Double Helicate
Two new dinuclear iron(II) complexes (1·PF6 and 1·AsF6) of the general formula [FeII2(L2C3)2](X)4·nH2O·mMeCN (X = PF6, n = m = 1.5 for 1·PF6 and X = AsF6, n = 3, m = 1 for 1·AsF6) have been prepared…
Varied spin crossover behaviour in a family of dinuclear Fe(ii) triple helicate complexes.
TLDR
Dinuclear triple-helicate complexes of the formula [Fe2L3](BF4)4·solv (solv = CH3CN, CHCl3, H2O) have been synthesised and structurally characterised and magnetic-susceptibility measurements reveal the T1/2 values of 2 and 3 to be strongly dependent upon the solvent and degree of solvation.
Two ways of spin crossover in an iron(ii) coordination polymer associated with conformational changes of a bridging ligand.
1,4-Di(1-ethyl-1,2,3-triazol-5-yl)butane (bbtre) was prepared by lithiation of 1-ethyl-1,2,3-triazole, followed by alkylation with 1,4-dibromobutane. The ligand bbtre forms a three-dimensional…
Synthesis, characterization, and redox potential properties of a new double-stranded Ni-bis(hydrazone)-based helicate
Direct monitoring of spin transitions in a dinuclear triple-stranded helicate iron(ii) complex through X-ray photoelectron spectroscopy.
TLDR
Both VT-SCXRD and XPS measurements show excellent correlation with the magnetic susceptibility experiments, demonstrating the power of XPS not just to confirm, but also to clearly follow the spin-state transition in Fe(ii) SCO complexes.
Spin-crossover in iron(ii)-Schiff base complexes.
TLDR
This perspective attempts to elucidate the structure-SCO property relationships governing SCO in selected mono-, bi-, and multi-nuclear iron(ii)-Schiff base complexes.
Crystal structure of (N 1,N 3-bis{[1-(4-methoxybenzyl)-1H-1,2,3-triazol-4-yl]methylidene}-2,2-dimethylpropane-1,3-diamine)bis(thiocyanato)iron(II)
TLDR
The title charge-neutral complex shows a cis-arrangement of the thiocyanate anions, with a severely distorted coordination polyhedron, with the one-dimensional supramolecular architecture formed by weak C—H⋯O/C/S/N hydrogen bonds.
Crystal structure of {N 1,N 3-bis[(1-tert-butyl-1H-1,2,3-triazol-4-yl)methylidene]-2,2-dimethylpropane-1,3-diamine}bis(thiocyanato)iron(II)
TLDR
The title charge-neutral complex shows a cis-arrangement of the thiocyanate anions, with a severely distorted coordination octahedron, formed by weak C—H⋯C/S/N hydrogen bonds.
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