Abstract
In the title compound, C19H22N2O4, the six-membered cyclohexenone ring of the chromene unit adopts an envelope conformation, with the dimethyl-substituted C atom as the flap, while the pyran ring has a boat conformation. These two mean planes are inclined to one another by 6.65 (13)°·The benzene ring is normal to the 4H-chromene moiety mean plane, making a dihedral angle of 89.18 (5)°. The methylamine and nitro groups are slightly twisted from the chromene moiety mean plane, with torsion angles C—N—C—O = 1.70 (18) and O—N—C—C = 0.15 (18)°. The molecular structure is characterized by an intramolecular N—H⋯O hydrogen bond, which generates an S(6) ring motif. In the crystal, molecules are linked via pairs of weak C—H⋯O hydrogen bonds, forming inversion dimers. These dimers are connected by further C—H⋯O hydrogen bonds, forming sheets lying parallel to (10-1).
Highlights
In the title compound, C19H22N2O4, the six-membered cyclohexenone ring of the chromene unit adopts an envelope conformation, with the dimethyl-substituted C atom as the flap, while the pyran ring has a boat conformation
These two mean planes are inclined to one another by 6.65 (13)ÁThe benzene ring is normal to the 4H-chromene moiety mean plane, making a dihedral angle of 89.18 (5)
The methylamine and nitro groups are slightly twisted from the chromene moiety mean plane, with torsion angles C—N—C—O = 1.70 (18) and O—N—C—C = 0.15 (18)
Summary
C19H22N2O4, the six-membered cyclohexenone ring of the chromene unit adopts an envelope conformation, with the dimethyl-substituted C atom as the flap, while the pyran ring has a boat conformation. These two mean planes are inclined to one another by 6.65 (13)ÁThe benzene ring is normal to the 4H-chromene moiety mean plane, making a dihedral angle of 89.18 (5). Molecules are linked via pairs of weak C—HÁ Á ÁO hydrogen bonds, forming inversion dimers. These dimers are connected by further C—HÁ Á ÁO hydrogen bonds, forming sheets lying parallel to (101)
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