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Facile Synthesis of Dibenzopentalene Dianions and Their Application as New π‐Extended Ligands
Author(s) -
Kuwabara Takuya,
Ishimura Kazuya,
Sasamori Takahiro,
Tokitoh Norihiro,
Saito Masaichi
Publication year - 2014
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201402304
Subject(s) - cyclic voltammetry , ruthenium , quenching (fluorescence) , silylation , chemistry , iodine , transition metal , potassium , diffraction , metal , photochemistry , medicinal chemistry , organic chemistry , electrochemistry , catalysis , electrode , fluorescence , physics , quantum mechanics , optics
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.