In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 14220-64-5, name is Bis(benzonitrile)palladium chloride, introducing its new discovery. Recommanded Product: Bis(benzonitrile)palladium chloride
The tridentate ligand, 2,6-bis-(benzimidazol-2?-yl)pyridine (bzimpy) coordinates to iron(II) and forms the mono- and bis-complexes, [FeLS3]2+ (S = solvent) and [FeL2]2+ in 50% (v/v) PC/MeOH (PC = propanedilo-1,2-carbonate). The complexes are characterized by observed metal-to-ligand charge transfer (MLCT) bands with absorption maximum at 500.0 ± 5.0 nm (epsilonmax = 200-700 1 mol-1 cm-1) for [FeLS3]2+ and at 555.0 ± 1.0 nm (epsilonmax = 5100-7500 1 mol-1 cm-1) for [FeL2]2+. The complexation equilibria are studied at an extended temperature range of 4, 13, 20 and 32 ± 1 C in 50% (v/v) PC/MeOH. The values of formation constants (log10beta2 = 10.90-11.47) are calculated and found to decrease with increasing temperature. The thermodynamic parameters (AH and AS) for complexation equilibria are 50.52 kJ mol-1 and 43.28 J mol-1 K-1, respectively. Study at low temperature (4 C) reveals the likely formation of a tris-complex, [FeL3]2+ in addition to [FeLS3]2+ and [FeL2]2+ in solution.
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Reference：
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method