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Acta Cryst. (2013). E69, o1859-o1860
[ doi:10.1107/S1600536813032212 ]


M. C. Costas-Lago, T. Costas, N. Vila and P. Besada

Abstract: In the title compound, C21H24N2O2Si, the carbonyl group of the heterocyclic ring and the O atom of the silyl ether group are placed toward opposite sides and the tert-butyl and pyridazinone moieties are anti-oriented across the Si-O bond [torsion angle = -168.44 (19)°]. In the crystal, mol­ecules are assembled into inversion dimers through co-operative N-H...O hydrogen bonds between the NH groups and O atoms of the pyridazinone rings of neighbouring mol­ecules. The dimers are linked by [pi]-[pi] inter­actions involving adjacent pyridazinone rings [centroid-centroid distance = 3.8095 (19) Å], generating ladder-like chains along the b-axis direction. The chains are further linked into a two-dimensional network parallel to the ab plane through weak C-H...[pi] inter­actions.

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