78871-13-3Relevant academic research and scientific papers
Molecular complex formation of tricarbonyl(η6-[2.2]paracyclophane)chromiuin and l,3,5-trinitrobenzene
Kobayashi, Hiroshi,Kobayashi, Ken,Kaizu, Youkoh
, p. 4135 - 4138 (2008/10/08)
Tricarbonyl(η6-[2.2]paracyclophane)chromium (([2.2]paracyclophane)Cr(CO)3) forms a charge-transfer complex with 1,3,5-trinitrobenzene (1,3,5-TNB) in 1,2-dichloroethane. The ionization potential of ([2.2]paracyclophane)Cr(CO)3 was determined to be 7.2 eV from the observed intermolecular charge-transfer transition energy. The value was close to those obtained for the usual chromium tricarbonyl complexes with η6-coordinated benzene derivatives. In solution, the acceptor molecule is more likely to interact directly with the chromium d orbital lobes by sitting beneath the base of the pyramid formed by three metal-carbonyl bonds rather than by stacking on the aromatic ring as in the usual aromatic molecular complexes. This is also supported by the fact that some other chromium-carbonyl complexes without an η6-coordinated aromatic ring also exhibit spectral evidence of complex formation with 1,3,5-TNB.
