Synthesis and properties of an optically active helical bis-cobaltocenium ion

…, WE Geiger, MP Robben, AL Rheingold

Index: Gilbert, Adam M.; Katz, Thomas J.; Geiger, William E.; Robben, Matthew P.; Rheingold, Arnold L. Journal of the American Chemical Society, 1993 , vol. 115, # 8 p. 3199 - 3211

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Citation Number: 64

Abstract

Abstract: The optically active helical bis-cobaltocenium salt 6 is synthesized, as are two related monocobaltocenium salts, 29 and 30. The structure of 6 is analyzed by X-ray diffraction, which shows that the metals are separated by 8.49 A. Reducing 6either electrochemically or with K (Hg) produces species that absorb near 920 nm, but the absorption is not an intervalence transition. It originates instead from isolated Co (11) ...