Effective Room Temperature Hydrogenation of Alkenes by X‐Ray Characterized Salicylaldimine‐Rhodium(I) Complex

Abstract

In the study, a mononuclear X‐ray characterized Rh(I) complex with salicylidene (salhyd) and cyclooctadiene (cod) ligands was synthesized. The synthesized complex was used as homogenous hydrogenation catalyst of styrene, 1‐octene and cyclohexene in several organic solvents at ambient temperature. Up to 400 ns/ncat ratio and 521 TON/TOF values were obtained with 100 % product formation for styrene and 96.7 % n‐octane and isomers (2‐octene and 3‐octene) at room temperature in one‐hour reaction time. Molecular hydrogen was used as hydrogen source, and the best activity was observed in dimethyl sulfoxide. Due to the high effectivity of synthesized catalyst at room temperature, the designed system became attractive on homogenous hydrogenation for selected olefins.

Green Hydrogenation of C=C, C=O, and C=N Bonds in Water by Palladium‐Tin Bimetallic Nanoparticles

“…Catalytic hydrogenation of C=C, C=O, and C=N bonds is one of the important methods for organic synthesis in both academia and industry, and is involved in making pharmaceutical intermediates, fragrances, fine and bulk chemicals [1–6] . Although several methods are available to achieve this goal, more specifically, catalytic reductions using molecular hydrogen at room temperature represent one of the most cost‐effective, atom‐efficient, and environmentally benign transformations [1,7–10] . The challenging aspect here is the semi‐hydrogenation and selective hydrogenation of one group without reducing another group present in the same moiety [11] .…”

“…[1][2][3][4][5][6] Although several methods are available to achieve this goal, more specifically, catalytic reductions using molecular hydrogen at room temperature represent one of the most cost-effective, atom-efficient, and environmentally benign transformations. [1,[7][8][9][10] The challenging aspect here is the semihydrogenation and selective hydrogenation of one group without reducing another group present in the same moiety. [11] In this regard, heterogeneous nano-catalysts are better than homogeneous catalysts for selective hydrogenation reactions both in terms of activity and recyclability.…”