Synthesis and Characterization of a Bimetallic Boratabenzene Cobalt Complex
| Autor: | and Andrew R. Cowley, Stephen Barlow, Dermot O'Hare, Tony Hascall, Victoria Beck |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Chemistry
Organic Chemistry Inorganic chemistry chemistry.chemical_element Electrochemistry Magnetic susceptibility Inorganic Chemistry Crystallography chemistry.chemical_compound Cyclopentadienyl complex Excited state Hexafluorophosphate Cobaltocene Physical and Theoretical Chemistry Bimetallic strip Cobalt |
| Zdroj: | Organometallics. 23:3808-3813 |
| ISSN: | 1520-6041 0276-7333 |
| DOI: | 10.1021/om049750y |
| Popis: | Reaction of 1,4-(BBr 2 ) 2 C 6 H 4 with cobaltocene gives a bimetallic cobalt complex with cyclopentadienyl and boratabenzene ligands. Oxidation allows the dicationic dicobalt(III) complex to be isolated; the bis(hexafluorophosphate) salt has been structurally characterized. Variable-temperature magnetic susceptibility measurements on the neutral dicobalt(II) complex showed substantial deviation from the Curie-Weiss law; a fit to the Bleaney-Bowers equation for a singlet ground state and a triplet excited state gave an exchange interaction of J = ca. -28 cm - 1 . Electrochemical studies, as well as near-infrared data on the mixed-valence species, suggest that the interaction between the metal centers is weak. |
| Databáze: | OpenAIRE |
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