Synthesis and chemical characterization of 2-methylpyridinium salts of planar nickel(II), palladium(II) and platinum(II) 1,2-dithiooxalato-S,S′ complexes. Crystal and molecular structure of bis(2-methylpyridinium) bis(1,2-dithiooxalato-S,S′)nickelate(II) | Publicación