4-(Dimethylamino)benzaldehyde

The title compound, C9H11NO, crystallizes with two independent but essentially identical molecules in the asymmetric unit, which are linked via a C-H center dot center dot center dot pi interaction. In both molecules, the aldehyde and dimethylamine groups are essentially coplanar with the attached benzene ring. In the crystal structure, C-H center dot center dot center dot O hydrogen bonds link one type of independent molecules into a chain along the a axis. In addition, the structure is stabilized by pi-pi stacking interactions involving the benzene rings [centroid-to-centroid distance = 3.697 (2) angstrom].