Facile Synthesis of Dibenzopentalene Dianions and Their Application as New π‐Extended Ligands |
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| Authors: | Takuya Kuwabara Dr Kazuya Ishimura Prof?Dr Takahiro Sasamori Prof?Dr Norihiro Tokitoh Prof?Dr Masaichi Saito |
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| Institution: | 1. Department of Chemistry, Graduate School of Science and Engineering, Saitama University, Shimo‐okubo, Sakura‐ku, Saitama, 338‐8570 (Japan), Fax: (+81)?48‐858‐3700;2. Theoretical and Computational Chemistry Initiative, Institute for Molecular Science, Myodaiji, Okazaki, Aichi, 444‐8585 (Japan);3. Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611‐0011 (Japan) |
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| Abstract: | Reduction of phenyl(silyl)ethynes with potassium followed by quenching with iodine gave dibenzopentalenes in moderate yields. The intermediates of the reactions, dipotassium dibenzopentalenides, were isolated. The first dibenzopentalene–transition‐metal complex was successfully synthesized. The ruthenium atoms are located above the six‐membered rings. However, X‐ray diffraction analysis and theoretical calculations revealed that the aromatic nature of the five‐membered rings was retained. The cyclic voltammetry of the Ru complex revealed two oxidation waves with relatively large separation. |
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| Keywords: | coordination modes cyclization potassium reduction ruthenium |
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