Preparation of 1′,1‴-Diethylbiruthenocene and a Study of the Mixed Valence State of Iodo-1′,1‴-Diethylbiruthenocenium(II,IV)+I⁻₃ by ¹H-NMR Spectroscopy

Masanobu Watanabe Department of Chemistry, College of Arts and Sciences, The University of Tokyo, Komaba, Meguro, Tokyo, 153, Japan

Toschitake Iwamoto Department of Chemistry, College of Arts and Sciences, The University of Tokyo, Komaba, Meguro, Tokyo, 153, Japan

Hirotoshi Sano Department of Chemistry, Faculty of Science, Tokyo Metropolitan University, Minami-ohsawa, Hachioji, Tokyo, 192-03, Japan

Izumi Motoyama Department of Chemistry, Faculty of Engineering, Kanagawa University, Rokkakubashi, Yokohama, 221, Japan

Abstract

1′,1‴-Diethylbiruthenocene(II), prepared from biruthenocene via diacetylbiruthenocene(II), is oxidized by iodine to give the iodo-1′.1‴-diethylbiruthenocenium(II,IV)⁺I⁻ ₃ salt. The temperature dependence of the ¹H-NMR spectra observed for the salt in acetone suggests the rate of electron transfer between the Ru^II and Ru^IV decreases as compared with that in iodo-1,1″-biruthenocenium(II,IV)⁺I⁻ ₃ owing to steric hindrance caused by the ethyl groups.

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Preparation of 1′,1‴-Diethylbiruthenocene and a Study of the Mixed Valence State of Iodo-1′,1‴-Diethylbiruthenocenium(II,IV)+I⁻₃ by ¹H-NMR Spectroscopy

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Preparation of 1′,1‴-Diethylbiruthenocene and a Study of the Mixed Valence State of Iodo-1′,1‴-Diethylbiruthenocenium(II,IV)+I−3 by 1H-NMR Spectroscopy

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Preparation of 1′,1‴-Diethylbiruthenocene and a Study of the Mixed Valence State of Iodo-1′,1‴-Diethylbiruthenocenium(II,IV)+I⁻₃ by ¹H-NMR Spectroscopy