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• W2915796920 abstract "In this work we report the synthesis of five new nickel(II) complexes all coordinated to the tripodal ligand tris(1-ethyl-4- i Pr-imidazolyl)phosphine (TlEt4iPrIP). They are [Ni(T1Et4iPrIP)(CH3CN)2(OTf)](OTf) (1), [Ni(T1Et4iPrIP)(OTf)2] (2), [Ni(T1Et4iPrIP)(H2O)(OTf)](OTf) (3), [Ni(T1Et4iPrIP)Cl](OTf) (4), and [Ni(T1Et4iPrIP)Cl2] (5). The complexes serve as bioinorganic structural model complexes for histidine-coordinated nickel proteins. The X-ray structures have been determine for all complexes which feature coordination numbers 4-6. We investigated the spectroscopic interconversions for these compound in dichloromethane solution and demonstrate interconversion between 1-3 and conversion of 2 to 4. Complex 5 can be spectroscopically converted to the cation of 4 by dissolving it in dichloromethane. Fits of variable temperature magnetic susceptibility data yielded the following parameters: g = 1.944, D = -0.327 cm-1, E/D = 3.706 for 1; g = 2.280, D = -0.365 cm-1, E/D = 22.178 for 2; g = 2.000, D = -7.402 cm-1, E/D = -0.272 for 3; g = 2.176, D = -0.128 cm-1, E/D = -0.783 for 4; g = 2.258, D = 14.288 cm-1, E/D = 0.095 for 5. DFT structure optimizations afforded HOMO and LUMO energies indicating that complex 1 is the most stable." @default.
• W2915796920 created "2019-03-02" @default.
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• W2915796920 date "2019-04-01" @default.
• W2915796920 modified "2023-09-23" @default.
• W2915796920 title "Synthesis, structure, and characterization of tris(1-ethyl-4-isopropyl-imidazolyl-қN)phosphine nickel(II) complexes" @default.
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• W2915796920 doi "https://doi.org/10.1016/j.ica.2019.02.023" @default.
• W2915796920 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6867055" @default.
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