[5-5]Bitrovacene, (μ-η5:η5-Fulvalenediyl)bis[(η7-cycloheptatrienyl)vanadium]: Synthesis, Structure, and Intermetallic Communication1

Autor:	Klaus Harms, Olav Schiemann, Jürgen Pebler, Christoph Elschenbroich, Olaf Burghaus
Rok vydání:	1999
Předmět:	Diffraction Chemistry Organic Chemistry Resolution (electron density) Intermetallic Trans conformation Photochemistry Redox Magnetic susceptibility law.invention Inorganic Chemistry Crystallography law Physical and Theoretical Chemistry Electron paramagnetic resonance Single crystal
Zdroj:	Organometallics. 18:3273-3277
ISSN:	1520-6041 0276-7333
Popis:	Lithiation of trovacene, (η7-C7H7)V(η5-C5H5), Li/I exchange, and Pd(dppf)Cl2-catalyzed homocoupling affords [5-5]bitrovacene 52•. Intermetallic communication manifests itself in typical biradical features of the EPR spectrum and in the resolution of redox splittings of 147 mV for the two subsequent oxidations and 224 mV for the reductions, respectively. 52• adopts a trans conformation in the single crystal (X-ray diffraction) as well as in rigid solution (EPR spectroscopy). A magnetic susceptibility study of 52• reveals weak antiferromagnetic coupling (J = −2.78 cm-1) of the two V(d5) centers.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::006ffd1ac3f9e98981953680bea5274d https://doi.org/10.1021/om9902232 Zobrazit plný text záznamu