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- W1983453208 abstract "The meso (1a) isomer of the IrIIIReIIIIrIII trinuclear complex [Re{Ir(aet)3}2]3+ (aet=2-aminoethanethiolate) was newly prepared by SnCl2·2H2O reduction of an acidic mixture of fac(S)-[Ir(aet)3] and NH4ReO4, and purified by column chromatography. The racemic (1b) isomer was isolated by the reaction of fac(S)-[Ir(aet)3] with [Re(Metu)6]Cl3 (Metu=N-methylthiourea). The crystal structures of 1aBr3 and 1bBr3·H2O were determined by X-ray crystallography. Both isomers consist of two terminal fac(S)-[Ir(aet)3] units and a central Re atom, forming the linear-type S-bridged trinuclear structure. The central Re atom is situated in an octahedral environment with ReIIIS6 chromophore. Both 1a and 1b are fairly stable in water under aerobic condition and they were characterized spectrochemically. Further, 1b was optically resolved by a column chromatographic method, and it is characterized by CD spectroscopy. The ReIII ion, which has a d4-electronic configuration, in 1b indicates a lower magnetic moment (1.11μB) at room temperature, reflecting well the paramagnetic shifts for 1H and 13C NMR signals. Each cyclic voltammogram of [Re{M(aet)3}2]3+ (M=IrIII, RhIII) shows a reversible redox process (MIV/III) in a positive region and they are confirmed by a spectroelectrochemical technique. Their redox potentials at E0′=+0.34–+0.60 V (vs. Ag/AgCl) are lower than those for the corresponding complexes, whereas it was elucidated that the oxidation state of the ReIII ion is highly stabilized in the S-bridged trinuclear structures." @default.
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- W1983453208 date "2002-08-01" @default.
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- W1983453208 title "Characterization and electrochemical properties for rhenium(III) ion incorporated into linear-type S-bridged trinuclear complexes. Crystal structures of ΔΛ- and ΔΔ/ΛΛ-[Re{Ir(aet)3}2]3+ (aet=2-aminoethanethiolate)" @default.
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- W1983453208 doi "https://doi.org/10.1016/s0277-5387(02)01059-8" @default.
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