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, 141-30-0, name is 3,6-Dichloropyridazine, introducing its new discovery. Quality Control of 3,6-Dichloropyridazine
La condensation du reactif de Grignard du bromo-2-thiophene avec les derives bihalogenes, tels que le dichloro-1,2-ethene (Z), la dichloro-2,4-pyrimidine et la dichloro-3,6-pyridazine, en presence de catalyseur a base de metal de transition permet d’obtenir, en une seule etape, des derives polycycliques, comportant deux noyaux thiophenes.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Quality Control of 3,6-Dichloropyridazine. In my other articles, you can also check out more blogs about 141-30-0
Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N1823 – PubChem