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- W1993915312 abstract "The reactions of the quadruply bonded complexes (n-Bu4N)2Re2X8 (X=Cl, Br) with excess 3,6-dithiaoctane (CH3CH2SCH2CH2SCH2CH3 or dto) under forcing conditions lead to the compounds Re2Cl5(dto)2 (1) and Re2Br5(dto)2 (2) with Re–Re triple bonds. X-ray crystallographic studies of compounds 1 and 2 reveal a common staggered, unsymmetrical molecular geometry with both dto ligands chelated to the same metal atom. This Re atom is also bonded to a single axial halide ligand, while the other four halides surround the second Re atom. In contrast to the only previous example of this type of dirhenium compound, Re2Cl5(dithiahexane)2, there is no sharing of axial chloride ligands between molecules in the crystal lattices of 1 and 2. The Re–Re bond distances are 2.2772(8) and 2.2826(6) Å in 1 and 2, respectively. Magnetic measurements, cyclic voltammetry, and IR, Vis and ESR spectra of 1 and 2 are reported. Addition of dto to a solution of (n-Bu4N)2Re2(NCS)8 leads to the formation of (n-Bu4N)2Re2(NCS)8·dto (3). Crystallographic studies show 3 to consist in the solid state of chains of [Re2(NCS)8]2– units linked together by dto molecules with each dto sulfur atom weakly coordinated to axial sites on Re atoms of different anions. The Re–Re quadruple bond distance in 3 is 2.2854(3) Å." @default.
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- W1993915312 date "2001-04-01" @default.
- W1993915312 modified "2023-09-27" @default.
- W1993915312 title "Products of the reactions of [Re2X8]2– with 3,6-dithiaoctane (dto). Preparation and crystal structures of Re2Cl5(dto)2, Re2Br5(dto)2, and (n-Bu4N)2Re2(NCS)8·dto" @default.
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- W1993915312 doi "https://doi.org/10.1016/s0277-5387(01)00692-1" @default.
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