82555-88-2Relevant academic research and scientific papers
Anionic fullerene-60 complexes of manganese(-I), cobalt(-I), and rhenium(-I): Thermal and photoinduced electron transfer processes between metal carbonylate anions and C60
Thompson, David M.,Bengough,Baird, Michael C.
, p. 4762 - 4770 (2008/10/08)
Thermal and photochemical reactions of THF solutions of the carbonylate salts A[Mn(CO)5], A[Co(CO)4], and A[Re(CO)5] (A = Na, PPN) with suspensions of C60 result in electron transfer to give [C60]- and the transient 17-electron, metal-centered radicals Mn(CO)5, Co(CO)4, and Re(CO)5, respectively. However, the ensuing secondary processes vary significantly, depending on the metal and the reaction conditions. With manganese and rhenium, self-coupling of M(CO)5 (M = Mn, Re) to give the metal-metal bonded dimers M2(CO)10 and coupling of M(CO)5 with [C60]- to give the η2-C60 complexes A[Mn(CO)4(η2-C60)] both occur under thermal and photochemical conditions. In contrast, the photochemical processes ultimately result also in complete homolysis of the dimers and regeneration of the metal-centered radicals, which then combine with fullende ion [C60]- still remaining in solution to form more of the η2-C60 complexes. In the case of cobalt, no Co2(CO)8 is formed, but the η2-C60 complex [Co(CO)3(η2-C60]- is produced. While the latter is thermally unstable in refluxing THF, undergoing decarbonylation to the previously reported mixed metal fullende compound NaCoC60·3THF, it is thermally stable under photochemical conditions at room temperature. Spectroscopic evidence suggests that much of the negative charge in [Mn(CO)4(η2-C60)]- is delocalized onto the fullerene ligand; as a result, the η2-C60-Mn bond is unusually strong and the complex [Mn(CO)4(η2-C60)]- is very stable, exhibiting little of the chemistry associated with either neutral η2-C60 complexes or the analogous [Mn(CO)5]-.
ELECTROCHEMICAL STUDIES ON ORGANOMETALLIC COMPOUNDS. VIII. LIGAND EXCHANGE REACTION IN CARBONYL COBALT COMPLEXES
Reeb, P.,Mugnier, Y.,Moise, C.,Laviron, E.
, p. 247 - 254 (2007/10/02)
The reaction of Co(CO)3DMPP- with Co2(CO)6(DMPP)2 (DMPP = dimethylphenylphosphine) yields CoCO4- and Co2(CO)5(DMPP)3.The DMPP ligand of Co(CO)3DMPP- can be replaced by CO or triphenylphosphite.
ELECTROCHEMICAL STUDIES ON ORGANOMETALLIC COMPOUNDS. V. ELECTROCHEMICAL OXIDATION OF THE ANIONS - AND -
Mugnier, Y.,Reeb, P.,Moise, C.,Laviron, E.
, p. 111 - 118 (2007/10/02)
In tetrahydrofuran with tetrabutylammonium hexafluorophosphate as supporting electrolyte, 1e electrochemical oxidation of - gives Co2(CO)8; in the presence of dimethylphenylphosphine (DMPP), the process consumes two electrons and + is obtained.The same cation is also obtained by 2 F axidation of - in the presence of DMPP.In all cases a radical intermediate is formed.
