title: Solid-state structure of free base guanidine achieved at last.
abstract: "Crystal structure of the free base guanidine determined 148 years after the first synthesis": A prototype structure unveiled--despite its provocative simplicity, the crystal structure of guanidine has not been previously described. 148 years after the first synthesis of guanidine, we now find two Y-shaped symmetry-independent molecules in the unit cell that are interconnected by a hydrogen-bonding network, which results in a fascinating layered structure (see picture).
authors.affiliation: Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Yamada
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Liu
authors.forename: Ulli
authors.initials: U
authors.lastname: Englert
authors.forename: Hisanori
authors.initials: H
authors.lastname: Yamane
authors.forename: Richard
authors.initials: R
authors.lastname: Dronskowski
mesh_terms: D018360:Crystallography, X-Ray; D019791:Guanidine / Q000737:chemistry*; D006860:Hydrogen Bonding; D008968:Molecular Conformation; D015394:Molecular Structure
chemical_list: D019791:Guanidine