A method was established for determining two intermediates in synthesis of imidacloprid, 2 chloro 5 methylpyridine and 2 chloro 5 chloromethyl pyridine by HPLC.
The quantitative relationships between the catalytic ability of Rh-complex of 2-vinyl pyridine-methyl methacrylate copolymer and the sequence structures of the copolymer ligands have been determined.
In a certain condition, the corrosion inhibition properties of 2-methyl-pyridine 4-methyl-pyridine pyridine and 3-methyl-pyridine goes up respectively.