| Abstract
| - Tetrahedral cluster complexes [(Ph3P)2N][Re3(CuX)(μ3−S)4Cl6(PMe2Ph)3] (X = Cl, Br, and I) with no Re−Cu bonding interaction (Re−Cu distances are ca. 350 pm) have been synthesized. Their solutions have the characteristic intense blue color with visible spectral bands near 600 nm.
- The reaction of a trinuclear rhenium sulfide cluster compound Re3S7Cl7 with dimethylphenylphosphine and CuX2(X = Cl or Br) or CuX (X = Cl, Br, or I) formed tetranuclear cluster complexes [(Ph3P)2N][Re3(CuX)(μ3-S)4Cl6(PMe2Ph)3] (X = Cl, Br, or I). Their solutions have the characteristic intense blue color with visible spectralbands near 600 nm. Single-crystal X-ray structures show that three μ-S atoms in the intermediate trinuclear rheniumcomplex coordinate to a copper atom, forming elongated tetrahedral structures in which Re−Cu bonding interactionis negligible (Re−Cu distances are 3.50∼3.54 Å as compared with Re−Re distances ranging from 2.69 to 2.81 Å).
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