Ethyl 3-methyl-6-oxo-5-[3-(tri­fluoro­methyl)­phenyl]-1,6-di­hydro-1-pyridazine­acetate

The title compound, C₁₆H₁₅F₃N₂O₃, is composed of a 3-(tri­fluoro­methyl)­phenyl ring and a pyridazinone ring, which are approximately coplanar, and an ethyl acetate group on the pyridazinone ring. In the crystal structure, centrosymmetric­ally related mol­ecules form dimers through non-classical intermolecular C—H...O hydrogen bonds.

3-Benz­yl­oxy-6-fluoro­pyridazine

The title mol­ecule, C₁₁H₉FN₂O, was synthesized from 3,6-difluoro­pyridazine, benz­yl alcohol and sodium hydro­xide in CH₃CN under reflux. The asymmetric unit contains two independent mol­ecules with nearly identical geometry. In the crystal structure, the mol­ecules are linked by weak inter­molecular C—H...F hydrogen bonds and C—H...π inter­actions.

3,6-Bis(4-methoxy­benz­yloxy)pyridazine

In the crystal structure of the title compound, C₂₀H₂₀N₂O₄, the mol­ecules are linked by a weak inter­molecular C—H...N hydrogen bond. The molecule has crystallographic twofold rotation symmetry.