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- W2047564942 abstract "A series of new dioxouranium(VI) complexes has been synthesised using N-(salicylidene)-L-histidine (H2sal-Lhis) and N-(o-vanillylidene)-L-histidine (H2van-L-his) and the corresponding D-histidines. They have been characterized by elemental analyses and physicochemical studies. The crystal and molecular structures of [UO2(van-L-his)(bipy)]·MeOH·H2O (bipy = 2,2′-bipyridine) have been determined by X-ray crystallography. The aldimine ligand in this compound is tridentate. The methanol and water molecules are hydrogen bonded to each other and the water molecule to the carboxylate O atom. The diamagnetic UO22+ entity serves as a chiroptical probe, undergoing stereospecific complex formation with the aldimine ligands. as well as for the interpretation of their 1H NMR spectra, which in conjunction with two-dimensional NMR spectra, reveal the different spin-spin interactions, including the long range one between the azomethine (CHN) and Hα proton of the amino acid residue. The CD and NMR spectral data of the quasi-enantiomorphous UO22+ complexes containing the L-/D-amino acid residues have helped to ascertain the conformational differences between each such pair; these differences can modulate energies of the half-filled highest occupied molecular orbitals in different ways. As these orbitals are involved in the electron-transfer process, the relevant complexes respond differently when subjected to cyclic voltammetry." @default.
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- W2047564942 date "1994-01-01" @default.
- W2047564942 modified "2023-09-27" @default.
- W2047564942 title "Synthesis, chiroptical and electrochemical studies of dioxouranium(<scp>VI</scp>) complexes of aldimine derivatives of<scp>L</scp>-/<scp>D</scp>-histidine and crystal structure of (2,2′-bipyridyl)dioxo(N-o-vanillylidene-<scp>L</scp>-histidinato)uranium(<scp>VI</scp>)–water–methanol(1/1/1)" @default.
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- W2047564942 doi "https://doi.org/10.1039/dt9940002381" @default.
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