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- W2029591012 endingPage "4760" @default.
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- W2029591012 abstract "The salt elimination reactions of (IPr2Me2)2FeCl2 (IPr2Me2 = 1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene) with the corresponding aryl Grignard reagents afford [(IPr2Me2)2FeAr2] (Ar = Ph, 3; C6H4-p-Me, 4; C6H4-p-tBu, 5; C6H3-3,5-(CF3)2, 6) in good yields. X-ray crystallographic studies revealed the presence of both tetrahedral and trans square planar isomers for 3 and 6 and the tetrahedral structures for 4 and 5. Magnetic susceptibility and 57Fe Mössbauer spectrum measurements on the solid samples indicated the high-spin (S = 2) and intermediate-spin (S = 1) nature of the tetrahedral and square planar structures, respectively. Solution property studies, including solution magnetic susceptibility measurement, variable-temperature 1H and 19F NMR, and absorption spectroscopy, on 3–6, as well as an 57Fe Mössbauer spectrum study on a frozen tetrahydrofuran solution of tetrahedral [(IPr2Me2)257FePh2] suggest the coexistence of tetrahedral and trans square planar structures in solution phase. Density functional theory calculations on (IPr2Me2)2FePh2 disclosed that the tetrahedral and trans square planar isomers are close in energy and that the geometry isomerization can occur by spin-change-coupled geometric transformation on four-coordinate iron(II) center." @default.
- W2029591012 created "2016-06-24" @default.
- W2029591012 creator A5001618715 @default.
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- W2029591012 date "2015-03-30" @default.
- W2029591012 modified "2023-10-16" @default.
- W2029591012 title "Four-Coordinate Iron(II) Diaryl Compounds with Monodentate <i>N</i>-Heterocyclic Carbene Ligation: Synthesis, Characterization, and Their Tetrahedral-Square Planar Isomerization in Solution" @default.
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- W2029591012 doi "https://doi.org/10.1021/acs.inorgchem.5b00138" @default.
- W2029591012 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25822256" @default.
- W2029591012 hasPublicationYear "2015" @default.
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