7,7 Di­methyl 2 methyl­amino 4 (4 methyl­phenyl) 3 nitro 7,8 di­hydro 4H chromen 5(6H) one

In the crystal, pairs of molecules are linked by N—H O and weak C—H O hydrogen bonds involving the same acceptor atom, forming inversion dimers.. In addition,

In the crystal, molecules are linked by pairs of O—H O hydrogen bonds, forming inversion dimers with an R 2 2 (28)..

In the crystal, molecules are linked via pairs of N— H N hydrogen bonds, forming inversion dimers, which are reinforced by pairs of C—H S hydrogen bonds.. The dimers are

Keywords: crystal structure; chromene; chromones; pyran; hydrogen bonding; C—H interactions; – interactions; inversion dimers.. CCDC reference

In the crystal, pairs of N—H···N hydrogen bonds form inversion dimers with an R 2 2 (12) ring motif (Table 1 and Fig.. In addition, C—H···π interactions

C—H interactions link the molecules into inversion dimers and C—H O hydrogen bonds link these dimers into columns extended in [010].. The crystal packing exhibits

In the crystal, inversion dimers linked by pairs of C—H O interactions generate R 2 2 (20) loops and further C—H O hydrogen bonds link the dimers into (001) sheets.. Weak

In the crystal, molecules are linked into inversion dimers by pairs of C—H N hydrogen bonds and these dimers are further connected by N—H O hydrogen bonds, forming a tape