Catalytic Hydrogenation of Carbon Dioxide Using Ir(III)−Pincer Complexes

Recent Advances in Transition Metal-Catalysed Homogeneous Hydrogenation of Carbon Dioxide in Aqueous Media

“…The PNP-Ir trihydride complex, 10, showed the highest TON (3,500,000) and TOF (150,000 h −1 ) to date. (Tanaka et al, 2009) In 2011, Hazari and co-workers investigated CO2 insertion into PNP-Ir hydrides using a computational method. (Schmeier et al, 2011) They evaluated the nucleophilicity of the hydride through its calculated NBO charge and found a strong correlation between the NBO charge of the hydride and the thermodynamics of CO2 insertion.…”

Effect of Hydrated Metal Salts on the Coordination Product of Cobalt(II) halide and PNP Type Ligand, 2,6-bis(di-tertbutylphosphinomethyl) pyridine

“…Phosphorous and nitrogen as donor atoms in the pincer type ligands provide a unique, highly protective environment for the resident metal in their complexes [3,4,5]. This provides unique opportunities in various research fields for exploring the use of these transition metal complexes as catalysts [6,7,8,9]. The donor atoms and their corresponding substituents allow tuning of the steric and electronic properties of such complexes.…”

“…With many applications, pincer-ligated group 8 and 9 complexes have already received much attention [10,11]. These complexes are effective catalysts for the reduction of carbon dioxide into useful chemicals [7,10], polymerization of alkenes [9], hydrogenation of esters to alcohols [12], hydrogenation of amides to amines and alcohols under mild conditions [13] and also in a large number of other chemical transformations [14,15,16]. These reactions are usually carried out in a moisture free environment.…”

The CO2 dissociation mechanism on the small copper clusters—the influence of geometry

“…However, a far more interesting approach is to 1 3 98 Page 2 of 9 selective to hydrocarbons-CH 4 and C 2 H 4 -than any other metal [10]. The mechanism of the Cu activity in the electrochemical reduction of CO 2 has been theoretically explored by the group of Norskov [13], and the experimental results of Koper and co-workers [14] provided more insight into the mechanism of this selectivity.…”