Chlorotris(Triphenylphosphine)Rhodium(I): Its Chemical and Catalytic Reactions

Reversible Coordination of H2 by a Distannyne

“…The interaction of hydrogen with transition metals is a key process in organometallic chemistry. − Furthermore, reversible oxidative addition and reductive elimination reactions of H 2 with transition metal complexes constitute fundamental steps in many catalytic cycles. , Such processes have been widely studied not only in organometallic chemistry but also in surface chemistry − and hydrogenase enzymes , and in connection with their relevance to chemical hydrogen storage. , In effect, the binding, storage, and release of H 2 under mild conditions are of major importance, − but despite the investigations of several H 2 carrier species, e.g., amine borane, Mg, , or Al , systems, there have been relatively few instances where reversible absorption and release of hydrogen has been effected under mild conditions for main-group compounds. − Two examples involve the use of metal-free frustrated Lewis pair systems − and antiaromatic boron-containing organic rings . In addition, several main-group compounds have been shown to react with H 2 under ambient conditions to yield hydrides. − These include low-valent group 13 and 14 element compounds, which feature frontier orbitals with small energy separations and suitable symmetry to react with H 2 and whose reactivity can mimic that of transition metal complexes .…”

Activation of Hydrogen by Palladium(0): Formation of the Mononuclear Dihydride Complextrans‐[Pd(H)2(IPr)(PCy3)]

“…[1] Late transition metals employed to catalyze this transformation have exhibited impressive performances. In its homogeneous incarnation, transition-metal catalyzed hydrogenation is best mediated by rhodium (notably Wilkinsons catalyst) [2] or iridium [3] complexes. Other metals have fared better in heterogeneous systems, as is the case for palladium whose use in its supported form, Pd/C, is ubiquitous.…”

A Novel Wilkinson’s Type Silica Supported Polymer Catalyst: Insights from Solid-State NMR and Hyperpolarization Techniques

“…Transition metal complexes are widely used as homogeneous catalysts in the synthesis of fine chemicals, natural products, and pharmaceuticals. − One of the most prominent homogeneous catalysts is Wilkinson’s catalyst [RhCl­(PPh 3 ) 3 ]. It was first utilized as efficient catalyst in various chemical conversions such as hydrogenation of alkenes and alkynes, − hydrosilylation, oxidation, and isomerization. − Importantly, the catalytic activity of Wilkinson’s catalyst in hydrogenation has been successfully employed in the synthesis of pharmaceuticals such as the antiparasitic agent ivermectin, , whose antiviral property is currently discussed in the context of COVID-19 treatment . Moreover, Wilkinson’s catalyst has been applied efficiently in parahydrogen induced polarization (PHIP) to boost sensitivity in liquid NMR − and to study reaction intermediates in the catalytic cycle …”