Synthetic Route of 16858-01-8, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.16858-01-8, Name is Tris(2-pyridylmethyl)amine, molecular formula is C18H18N4. In a Article£¬once mentioned of 16858-01-8
Mechanism of water exchange on five-coordinate copper(II) complexes
The effects of temperature and pressure on the water exchange reaction of the five-coordinate complexes [Cu(tmpa)(H2O)]2+ and [Cu(fz2(H2O)]2- (tmpa = tris(2-pyridylmethyl)amine; fz= ferrozine = 5,6-bis(4-sulfonatophenyl)-3-(2-pyridyl)-1,2,4-triazine) were studied by employing 17O NMR spectroscopy. The former compound shows a solvent exchange rate constant kexof (8.6 ¡À 0.4) ¡Á 106 s-1 at 298 K and ambient pressure, within a factor of three of that for the corresponding process for [Cu(tren)(H2O)]2+ (tren = 2,2?,2?-triaminotriethylamine). The activation parameters DeltaH# DeltaS# and DeltaV# for the reaction are 43.0 ¡À 1.5 kJ mol-1, +32 ¡À 6 J K -1 mol-1 and -3.0 ¡À 0.1 cm3 mol-1, respectively. For [Cu(fz)2(H2O)]2-, Kex is (3.5 ¡À 2.6) ¡Á 105 s-1 at 298 K and ambient pressure, which is about an order of magnitude less than for [Cu(tren)(H2O)]2+. The DeltaH#,DeltaS# and DeltaV# values for the water exchange are 25.9 ¡À 2.2 KJ mol-1, -52 ¡À 7 J K -1 mol -1 and -4.7 ¡À 0.2 cm3mol-1 The activation volume is modestly negative for both reactions and therefore implies an associative interchange (Ia) mechanism. The results are discussed in reference to data for water exchange reactions of Cu(II) complexes available from the literature.
A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 16858-01-8
Reference£º
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI