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, 6960-42-5, name is 7-Nitro-1H-indole, introducing its new discovery. Safety of 7-Nitro-1H-indole
(Chemical Equation Reprentation) Synthetic methods: A new, selective Pd-catalyzed domino reaction of 2- alkynylbenzaldehydes with indoles has been developed for the synthesis of 5H-benzo[b]carbazol-6-yl ketones. The isobenzopyrylium complex is trapped by indole at room temperature to give 3-(1H-isochromen-1-yl)-y1)-indoles, which can be transformed into 5Hbenzo[b]carbazol-6-yl ketones by raising the temperature (see scheme). These ketones exhibit intense fluorescence and interact with metal ions to enhance the fluorescence intensity.
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 6960-42-5 is helpful to your research. Safety of 7-Nitro-1H-indole
Reference：
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles