1-Methyl-2-(4-methyl-phen-yl)-4-morpholinopyridazine-3,6(1H,2H)-dione

Abstract

The structure analysis of the title compound, C(16)H(19)N(3)O(3), has been undertaken in order to facilitate the inter-pretation of (1)H and (13)C NMR data and to determine the position of the morpholine residue in this nucleophilic substitution product. The main result is that the morpholine group, with a chair conformation, is connected at the 4-position of the pyridazine ring. The benzene and pyridazine rings make a dihedral angle of 62.17 (5)°. Mol-ecules are linked into a two-dimensional network by non-classical C-H⋯O hydrogen bonds, in which O atoms serve as double or triple acceptors.

Fig. 1.

The molecular structure of (I), showing the atomic labelling scheme. Non-H atoms are drawn as 30% probability displacement ellipsoids.

Fig. 2.

Molecular packing and hydrogen bonds (dotted lines); symmetry codes: (i) 1 - x, 1/2 + y, 1 - z, (ii) 2 - x, 1/2 + y, -z. H atoms not involved in hydrogen bonds have been omitted for clarity.

Fig. 3.

Molecular packing and hydrogen bonds (dotted lines); symmetry codes: (i) 1 - x, 1/2 + y, 1 - z, (ii) 2 - x, 1/2 + y, -z. H atoms not involved in hydrogen bonds have been omitted for clarity.