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, 22426-14-8, name is 2-Bromo-1,10-phenanthroline, introducing its new discovery. Computed Properties of C12H7BrN2
We have described herein a series of unsymmetric 1,10-phenanthroline (phen) based aromatic heterocyclic derivatives with triphenylamine (TPA) and thiophene donors (L1-L5) and their respective neutral tricarbonyl rhenium(I) complexes (6a-6e). Comparisons between isomeric compounds L1/L2 and 6a/6b as well as L3/L4/L5 and 6c/6d/6e have been made on their 1H NMR and UV/Vis spectra, single-crystal structures and density function theory (DFT) calculations. The alterations of conjugated system of the whole molecules, originating from the introduction of 2-, 3- or 3,8-substituted TPA and thiophene groups of phen, are responsible for the structural and spectral discrepancy of these structural isomers. In particular, the introduction of TPA and/or thiophene donors at 2-postion of phen (L1 and L3) leads to smaller band gaps than their respective 3-substituted isomers (L2 and L4). In addition, rhenium(I) ion complexation could slightly lower the highest occupied molecular orbital (HOMO) energy levels but significantly decrease the lowest unoccupied molecular orbital (LUMO) energy levels of the molecular system.
The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 22426-14-8 is helpful to your research. Computed Properties of C12H7BrN2
Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI