The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.4488-22-6, Name is [1,1′-Binaphthalene]-2,2′-diamine, molecular formula is C20H16N2. In a Article，once mentioned of 4488-22-6, Recommanded Product: [1,1′-Binaphthalene]-2,2′-diamine
A cobalt(iii) complex (1) of a salcy-type ligand tethering 4 quaternary ammonium salts, which is thought to act as a highly active catalyst for CO 2/propylene oxide (PO) copolymerization, also shows high activity (TOF, 25900 h-1; TON, 518000; 2.72 kg polymer per g cat) and selectivity (>98%) for CO2/ethylene oxide (EO) copolymerization that results in high-molecular-weight polymers (Mn, 200000-300000) that have strictly alternating repeating units. The related cobalt(iii) complexes 11-14 were prepared through variations of the ligand framework of 1 by replacing the trans-1,2-diaminocyclohexane unit with 2,2-dimethyl-1,3- propanediamine, trans-1,2-diaminocyclopentane, or 1,1?-binaphthyl-2, 2?-diamine or by replacing the aldimine bond with ketimine. These ligand frameworks are thought to favour the formation of the cis-beta configuration in complexation, and the formation of the cis-beta configuration in 11-14 was confirmed through NMR studies or X-ray crystallographic studies of model complexes not bearing the quaternary ammonium salts. Complexes 11, 13, and 14, which adopt the cis-beta configuration even in DMSO did not show any activity for CO2/PO copolymerization. Complex 12, which was constructed with trans-1,2-diaminocyclopentane and fluctuated in DMSO between the coordination and de-coordination of the acetate ligand as observed for 1, showed fairly high activity (TOF, 12400 h-1). This fluctuating behaviour may play a role in polymerization. However, complex 12 did not compete with 1 in terms of activity, selectivity, and the catalyst cost.
Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.Recommanded Product: [1,1′-Binaphthalene]-2,2′-diamine, you can also check out more blogs about4488-22-6