1ST SYNTHESIS OF [FE4(ETA-5-C5H5)4S4](PF6)3 AND IMPROVED SYNTHESES OF [FE-4(ETA-5-C5H5)4S4](PF6) AND FE-4(ETA-5-C5H5)4S4](PF6)2

[Fe4(η5-C5H5)4S4](PF6) and [Fe4(η5-C6H5)4S4](PF6)2 were prepared in 81 and 82% yields, respectively, by bulk electrolysis of [Fe4(η5-C5H5)4S4] at the requisite potentials according to the results of voltammetric studies. [Fe4(η5-C5H5)4S4](PF6)3 was prepared and isolated first by electrolysis of [Fe4(η5-C5H5)4S4](PF6)2 in acetonitrile at +0.95 V vs. SCE in 83% yield. The electronic spectral data for [Fe4(η5-C5H5)4S4]n (n=0, 1+, 2+, 3+) were collected. © 1988 The Chemical Society of Japan.