A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 224311-51-7, Name is 2-(Di-tert-Butylphosphino)biphenyl, molecular formula is C20H27P. In a Article£¬once mentioned of 224311-51-7, Quality Control of: 2-(Di-tert-Butylphosphino)biphenyl
Enhanced hydrogen generation from formic acid by a biomimetic ruthenium complex with a covalently bonded phosphine ligand
A series of [Ru2(CO)5(mu-SCH2CH2CH2S)PXS] complexes (Ru2-S2-PXS, X?=?phosphine ligands, S?=?1?8) have been synthesized and evaluated for their photocatalytic H2 generation efficiencies from formic acid decomposition. The [Ru2(CO)5(mu-SCH2CH2CH2S)P(o-C6H4CH3)3] (Ru2-S2-PX4) catalyst?+?P(CH3)3 ligand exhibited a high turnover frequency of 15,840?h?1 and turnover number of 24,536. A mechanistic investigation of the Ru2-S2-PX4?+?FA/TEA catalyzed photocatalytic H2 generation reaction using ATR-IR, EI-MS, and NMR techniques suggested that when Ru2-S2-PX4 was photoirradiated, the P(o-C6H4CH3)3 was dissociated from the complex to form a new species, [Ru2(CO)5(mu-SCH2CH2CH2S)]* (I). The free P(o-C6H4CH3)3 then attacks a second molecule of Ru2-S2-PX4 to form Ru2-S2-(PX4)2 and release of free CO, which is then combined with species I to form Ru2-S2. Subsequent attachment of formate ion to species Ru2-S2-PX4, Ru2-S2, and Ru2-S2-(PX4)2 to form [Ru2(CO)5(mu-SCH2CH2CH2S)]-HCOO? (II), Ru2-S2-HCOO? (II?) and Ru2-S2-PX4-HCOO? (II?), respectively. Rearrangement of complex II (or II? or II?) and evolution of CO2 generate a transient complex [Ru2(CO)5(mu-SCH2CH2CH2S)H] (III), which then undergoes a protonation process to yield complex [Ru2(CO)5(mu-SCH2CH2CH2S)H2] (IV). Release of H2 and re-incorporation of the formate anion as well as evolution of CO2 regenerates the active complex III and the cycle begins again.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Quality Control of: 2-(Di-tert-Butylphosphino)biphenyl. In my other articles, you can also check out more blogs about 224311-51-7
Reference£º
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate