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• W2072516212 abstract "[CuL(SC6F5)] (1) (L = hydrotris(3,5-diisopropyl-1-pyrazolyl)borate anion) has been reported as a good model for blue copper proteins [Kitajima, N.; Fujisawa, K.; Tanaka, M.; Moro-oka, Y. J. Am. Chem. Soc. 1992, 114, 9232−9233]. To obtain more structural and spectroscopic insight, the first-row transition metal(II) substituted complexes of Cu(II) (1) to Mn(II) (2), Fe(II) (3), Co(II) (4), Ni(II) (5), and Zn(II) (6) were synthesized and their crystal structures were determined. These model complexes have a distorted tetrahedral geometry arising from the tripodal ligand L. The d value, which is defined by the distance from the N2S basal plane to the metal(II) ion, and the bond angles such as N−M−N and S−M−N are good indicators of these structural distortions. The obtained complexes were characterized by UV−vis absorption, EPR, NMR, far-IR, and FT-Raman spectroscopies and electrochemical and magnetic properties. In UV−vis absorption spectra, the sulfur-to-metal(II) CT bands and the d−d transition bands are observed for 1 and 3−5. For 1, the strong sulfur to Cu(II) CT band at 663 nm, which is one of the unique properties of blue copper proteins, is observed. The CT energies of the Fe(II) (3), Co(II) (4), and Ni(II) (5) complexes are shifted to higher energy (308 and 355 nm for 3, 311 and 340 nm for 4, 357 and 434 nm for 5) and are almost the same as the corresponding Co(II)- and Ni(II)-substituted blue copper proteins. In the far-IR spectra, three far-IR absorption bands for 2−6 at ca. 400, ca. 350, and ca. 310 cm-1 are also observed similar to those for 1. Other properties are consistent with their distorted tetrahedral geometries." @default.
• W2072516212 created "2016-06-24" @default.
• W2072516212 creator A5044561362 @default.
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• W2072516212 creator A5074298417 @default.
• W2072516212 date "2004-12-24" @default.
• W2072516212 modified "2023-10-14" @default.
• W2072516212 title "Structural and Spectroscopic Characterization of First-Row Transition Metal(II) Substituted Blue Copper Model Complexes with Hydrotris(pyrazolyl)borate" @default.
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• W2072516212 doi "https://doi.org/10.1021/ic049814x" @default.
• W2072516212 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/15651879" @default.
• W2072516212 hasPublicationYear "2004" @default.
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