title: Crystal structure of 1-(2,4-di-methyl-phen-yl)urea.
abstract: In the title urea derivative, C9H12N2O, the dihedral angle between the benzene ring and the mean plane of the urea group, N-C(=O)-N, is 86.6 (1)°. In the crystal, the urea O atom is involved in three N-H⋯O hydrogen bonds. Mol-ecules are linked via pairs of N-H⋯O hydrogen bonds, forming inversion dimers with an R (2) 2(8) ring motif. The dimers are linked by further N-H⋯O hydrogen bonds, forming two-dimensional networks lying parallel to (100).
authors.affiliation: Department of Chemistry, Kalasalingam University, Krishnankoil 626 126, India.
authors.forename: L
authors.initials: L
authors.lastname: Jayalakshmi
authors.affiliation: Department of Chemistry, Kalasalingam University, Krishnankoil 626 126, India.
authors.forename: C
authors.initials: C
authors.lastname: Ramalingan
authors.affiliation: Laboratory of X-ray Crystallography, Indian Institute of Chemical Technology, Hyderabad 500 067, India.
authors.forename: B
authors.initials: B
authors.lastname: Sridhar
authors.affiliation: Department of Physics & International Research Centre, Kalasalingam University, Krishnankoil 626 126, India.
authors.forename: S
authors.initials: S
authors.lastname: Selvanayagam
keywords: crystal structure; hydrogen bonding; urea; urea derivatives