Synthesis and crystal structure of 3,5‐diacetyl‐4‐methylpyrazole

Abstract magnified image The 3,5‐diacetyl‐4‐methylpyrazole diketone has been synthesized and its crystal structure has been determined. This diketone reacts with hydroxylamine hydrochloride to give the dioxime derivative. This reaction, conducted in presence of copper II ions, leads to the formation of L 2 M 2 copper II complexes. J. Heterocyclic Chem., (2010).