title: Hydrogen-bonded anionic rosette networks assembled with guanidinium and C3-symmetric oxoanion building blocks.
abstract: Two premeditated anionic rosette-layer architectures have been constructed using guanidinium and ubiquitous C3-symmetric oxoanions that carry unequal charges, employing bulky organic cations as interlayer templates. The undulate guanidinium-carbonate network occurs in 4[(C2H5)4N+].8[C(NH2)3+].3(CO3)2-.3(C2O4)2-.2H2O, in which the disordered (C2H5)4N+ guests are accommodated in pouches and channels within a complex three-dimensional hydrogen-bonded host framework. In [(C2H5)4N+]2.[C(NH2)3+].[1,3,5-C3H3(COO-)3].6H2O, ordered (C2H5)4N+ cations are sandwiched between planar guanidinium-trimesate host layers whose honeycomb cavities are tightly fitted with flattened-chair (H2O)6 clusters of symmetry 2.
authors.affiliation: Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, PR.
authors.forename: Chi-Keung
authors.initials: CK
authors.lastname: Lam
authors.forename: Feng
authors.initials: F
authors.lastname: Xue
authors.forename: Jie-Peng
authors.initials: JP
authors.lastname: Zhang
authors.forename: Xiao-Ming
authors.initials: XM
authors.lastname: Chen
authors.forename: Thomas C W
authors.initials: TC
authors.lastname: Mak
mesh_terms: D000838:Anions / Q000737:chemistry; D003460:Crystallization; D018360:Crystallography, X-Ray; D019791:Guanidine / Q000737:chemistry*; D006860:Hydrogen Bonding; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*
chemical_list: D000838:Anions; D009942:Organometallic Compounds; D019791:Guanidine