Synthesis and crystal structure of N¹,N²-di­methyl­ethane­dihydrazide

The title compound, N¹,N²-di­methyl­ethane­dihydrazide, C₄H₁₀N₄O₂, was obtained by the methyl­ation of oxalyl dihydrazide protected with phthalimide. The mol­ecule is essentially non-planar with a dihedral angle between the two planar hydrazide fragments of 86.5 (2)°. This geometry contributes to the formation of a multi-contact three-dimensional supra­molecular network via C—H⋯O, N—H⋯O and N—H⋯N hydrogen bonds.