2,9-Dimethyl-1,10-phenanthroline Dihydrate

A novel dihydrated form of 2,9-dimethyl-1,10-phenanthroline, C₁₄H₁₂N₂.2H₂O (neocuproine), is described. The molecule is very similar to that already reported in the literature, the main differences being in the packing. The positioning of the hydrogen atoms had a great influence in the convergence of the refinement process. This was performed in C2/m, though there were some suggestions of slight deviations from the crystallographic mirror symmetry.

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