Synthesis and crystal structure of N(1),N(2)-di-methyl-ethane-dihydrazide.

The title compound, N (1),N (2)-di-methyl-ethane-dihydrazide, C(4)H(10)N(4)O(2), was obtained by the methyl-ation of oxalyl dihydrazide protected with phthalimide. The mol-ecule 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 supra-molecular network via C-H⋯O, N-H⋯O and N-H⋯N hydrogen bonds.