title: 2-Acetyl-1,1,3,3-tetra-methyl-guanidine.
abstract: In the mol-ecule of the title compound, C(7)H(15)N(3)O, the central C atom is surrounded in a nearly ideal trigonal-planar geometry by three N atoms. The C-N bond lengths in the CN(3) unit are 1.3353 (13), 1.3463 (12) and 1.3541 (13) Å, indicating an inter-mediate character between a single and a double bond for each C-N bond. The bonds between the N atoms and the terminal C-methyl groups all have values close to that of a typical single bond [1.4526 (13)-1.4614 (14) Å]. In the crystal, the guanidine mol-ecules are connected by weak C-H⋯O and C-H⋯N hydrogen bonds, generating layers parallel to the ab plane.
authors.affiliation: Fakultät Chemie/Organische Chemie, Hochschule Aalen, Beethovenstrasse 1, D-73430 Aalen,  Germany.
authors.forename: Ioannis
authors.initials: I
authors.lastname: Tiritiris