43157-73-9Relevant academic research and scientific papers
Facile and regioselective C-H bond activation of aromatic substrates by an fe(II) complex involving a spin-forbidden pathway
Kalman, Steven E.,Petit, Alban,Gunnoe, T. Brent,Ess, Daniel H.,Cundari, Thomas R.,Sabat, Michal
, p. 1797 - 1806 (2013/05/09)
The Fe(II) complex Cp*Fe(CO)(NCMe)Ph (Cp* = η5-pentamethylcyclopentadienyl) is shown to mediate facile and highly regioselective C-H activation of aromatic substrates including benzene, furan, thiophene, thiazole, and 2-methylfuran. Experimental and computational evidence suggest a mechanism for C-H activation that involves NCMe dissociation, multiple spin intersystem crossings, C-H bond coordination, and C-H bond cleavage by a σ-bond metathesis reaction.
Halide abstraction as a route to cationic transition-metal complexes containing two-coordinate gallium and indium ligand systems
Bunn, Natalie R.,Aldridge, Simon,Kays, Deborah L.,Coombs, Natalie D.,Rossin, Andrea,Willock, David J.,Day, Joanna K.,Jones, Cameron,Ooi, Li-Ling
, p. 5891 - 5900 (2008/10/09)
Halide abstraction chemistry offers a viable synthetic route to the cationic two-coordinate complexes [{Cp*Fe(CO)2} 2(μ-E)]+ (7, E = Ga; 8, E = In) featuring linear bridging gallium or indium atoms. Structural, spectroscopic, and computational studies undertaken on 7 are consistent with appreciable Fe-Ga π-bonding character; in contrast, the indium-bridged complex 8 is shown to feature a much smaller π component to the metal-ligand interaction. Analogous reactions utilizing the supermesityl-substituted gallyl or indyl precursors of the type (η5-C5R5)Fe(CO)2E(Mes*)X, on the other hand, lead to the synthesis of halide-bridged species of the type [{(η5-C5R5)Fe(CO)2E(Mes*)} 2(μ-X)]+, presumably by trapping of the highly electrophilic putative cationic diyl complex [(η5-C 5R5)Fe(CO)2E(Mes*)]+.
Fe=B double bonds: Synthetic, structural, and reaction chemistry of cationic terminal borylene complexes
Coombs, Deborah L.,Aldridge, Simon,Rossin, Andrea,Jones, Cameron,Willock, David J.
, p. 2911 - 2926 (2008/10/09)
Application of halide abstraction chemistry to asymmetric haloboryl complexes (η5-C5-Me5)Fe(CO) 2B(ERn)X leads to the first synthetic route to cationic multiply bonded group 13 diyl species, [(η5-C5Me 5)Fe(CO)2B(ERn]+. The roles of steric bulk and π electron release within the ERn substituent in generating tractable borylene complexes have been probed, as has the nature of the counterion. A combination of spectroscopic, structural, and computational techniques leads to the conclusion that the bonding in complexes such as [η5-C5Me5)Fe-(CO)2B(Mes)] + is best described as an Fe=B double bond composed of B→Fe σ donor and Fe→B π back-bonding components. An extended study of the fundamental reactivity of cationic borylene systems reveals that this is dominated not only by nucleophilic addition at boron but also by iron-centered substitution chemistry leading to overall displacement of the borylene ligand.
