Electrochemical properties of two new binuclear ethyne-bridged cobalt complexes: bis-[(η5-cyclopentadienyl)cobaltη4-1,3-cyclopentadien-5-exo-yl)]-ethyne (1) and di-cobaltocenylium-ethyne-di-hexafluorophosphate (2)

Autor:	Christopher Rieker, Dagmar Obendorf, Herwig Schottenberger
Rok vydání:	1993
Předmět:	Chemistry General Chemical Engineering Inorganic chemistry chemistry.chemical_element Medicinal chemistry Dication chemistry.chemical_compound Cyclopentadienyl complex Hexafluorophosphate Pyridine Electrochemistry Cyclic voltammetry Acetonitrile Cobalt Metallocene
Zdroj:	Electrochimica Acta. 38:1527-1533
ISSN:	0013-4686
DOI:	10.1016/0013-4686(93)80285-8
Popis:	The results of an electrochemical study of two new π-bridged cobalt complexes [(η 5 -C 5 H 5 )Co{(η 4 -C 5 H 5 )-CC-(η 4 -C 5 H 5 )} ( 1 ) (η 5 -C 5 H 5 )Co&{(η 5 -C 5 H 4 )-CC-(η 5 -C 5 H 4 )}Co(η 5 -C 5 H 5 )] 2+ 2 PF − 6 ( 2 ) are discussed. Reduction of ( 2 ) proceeds in two reversible one-electron steps from the dication to the neutral compound. A Δ E 0 separation of 180 mV indicates interaction between the two ethyne-bridged cobalt centers. Further reduction of ( 2 ) leads to formation of a monoanion and subsequent decomposition. Oxidation of ( 1 ) occurs by an (E)ECE (E = electrochemical step, C = chemical step) process. The character of the chemical reaction has been probed by cyclic voltammetry in solvents of varying donor ability.
Databáze:	OpenAIRE
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