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Cocondensation of chromium atoms with phenanthrene vapor affords bisη 1,2,3,4,10a,4a - phenanthrene)chromium (4).  1  NMR spectroscopy reveals, that the diastereomers 4 (rac) and 4' (meso) are formed in a 2:1 ratio. Cyclic voltammetric studies on 4 show, that four oxidation states are accessible:[E° ═ -2.235 (rev.), -0.651 (rev.), + 0.82 (irrev.) V vs. SCE]. The radical ionsare characterized by ESR spectro­scopy in fluid and rigid solutions. Prominent feature of these species is the inverse relative magnitude of the g-tensor components:.

zeitschrift für naturforschung b

Metall-π-Komplexe von Benzolderivaten, XX [1]. Über die Cokondensation des Phenanthrens mit Chromatomen - Reaktivität, Redoxverhalten, ESR-und NMR-spektroskopische Untersuchungen / Metal-π-Complexes of Benzene Derivatives, XX [1]. Cocondensation of Phenanthrene with Chromium Atoms - Reactivity, Redox Behavior, ESR and NMR Spectroscopic Investigation