Abstract
A monocationic cluster complex of chromium sulfide [Cr 6S 8(H)(PEt 3) 6](BF 4) ( 2) was prepared by the oxidation of the corresponding neutral complex [Cr 6S 8(H)(PEt 3) 6] ( 1) with ferrocenium tetrafluoroborate and was characterized by the single-crystal X-ray structure analysis and ESI (electrospray-ionization) mass spectroscopy. Complex 2 has a Cr 6S 8 octahedral cluster core that holds an interstitial hydrogen atom. The Cr–Cr bond distances of 2 are ca. 0.2 Å longer than those of the starting neutral cluster 1. Magnetic measurements showed that the elongation of the CrCr bonds in the oxidized cluster 2 causes weakening of antiferromagnetic interaction through these bonds, as compared with the neutral complex 1.
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