5-[(tert-Butyl­diphenyl­sil­yloxy)meth­yl]pyridazin-3(2H)-one

In the title compound, C₂₁H₂₄N₂O₂Si, a new pyridazin-3(2H)-one derivative, the carbonyl group of the heterocyclic ring and the O atom of the silyl ether are located on the same side of the pyridazinone ring and the C—C—O—Si torsion angle is −140.69 (17)°. In the crystal, mol­ecules are linked by pairs of strong N—H...O hydrogen bonds into centrosymmetric dimers with graph-set notation R₂²(8). Weak C—H...π inter­actions are also observed.