RT info:eu-repo/semantics/article
T1 η6-Hexahelicene Complexes of Iridium and Ruthenium: Running along the Helix
A1 Álvarez González, Celedonio Manuel
A1 Barbero San Juan, Héctor
A1 García-Escudero, Luis A.
A1 Martín Álvarez, José Miguel
A1 Martínez-Pérez, Cristina
A1 Miguel San José, Daniel
AB The first η6-complexes of iridium and ruthenium coordinated to helicenes have been obtained. Hexahelicene (1), 2,15-dimethylhexahelicene (2), and 2,15-dibromohexahelicene (3) react with [Cp*IrCl2]2 and AgBF4 in CD3NO2 to afford quantitatively the complexes [Cp*Ir(η6-1)][BF4]2 (4A), [Cp*Ir(η6-2)][BF4]2 (5A), and [Cp*Ir(η6-3)][BF4]2 (6A), respectively. In all cases, the final thermodynamic products are similar, and they exhibit coordination between the 12 e– metal fragment [IrCp*]2+ and the terminal ring of the helicene. Monitoring the reaction by NMR shows formation of intermediates, some of which have been fully characterized in solution. These intermediates exhibit the metal fragment coordinated to the internal rings. We have also synthesized the bimetallic complex [(Cp*Ir)2(μ2-η6:η6-2)][BF4]4 (7), achieving coordination between two units [IrCp*]2+ and the helicene 2. Following an analogous methodology, we have prepared the complex [(η6-cymene)Ru(η6-2)][BF4]2 (8), which has been studied by X-ray diffraction, confirming the preferential binding to the terminal aromatic ring.
PB American Chemical Society
SN 0020-1669
YR 2012
FD 2012
LK https://uvadoc.uva.es/handle/10324/65797
UL https://uvadoc.uva.es/handle/10324/65797
LA eng
NO Inorg. Chem. 2012, 51, 15, 8103–8111
NO Producción Científica
DS UVaDOC
RD 24-nov-2024