title: Two novel silver(I) coordination polymers: poly[(mu2-2-aminopyrimidine-kappa2N1:N3)bis(mu3-thiocyanato-kappa3S:S:S)disilver(I)] and poly[(2-amino-4,6-dimethylpyrimidine-kappaN)(mu3-thiocyanato-kappa3N:S:S)silver(I)].
abstract: 2-Aminopyrimidine (L1) and 2-amino-4,6-dimethylpyrimidine (L2) have been used to create the two novel title complexes, [Ag2(NCS)2(C4H5N3)]n, (I), and [Ag(NCS)(C6H9N3)]n, (II). The structures of complexes (I) and (II) are mainly directed by the steric properties of the ligands. In (I), the L1 ligand is bisected by a twofold rotation axis running through the amine N atom and opposite C atoms of the pyrimidine ring. The thiocyanate anion adopts the rare mu3-kappa3S coordination mode to link three tetrahedrally coordinated Ag(I) ions into a two-dimensional honeycomb-like 6(3) net. The L1 ligands further extend the two-dimensional sheet to form a three-dimensional framework by bridging Ag(I) ions in adjacent layers. In (II), with three formula units in the asymmetric unit, the L2 ligand bonds to a single Ag(I) ion in a monodentate fashion, while the thiocyanate anions adopt a mu3-kappa1N,kappa2S coordination mode to link the AgL2 subunits to form two-dimensional sheets. These layers are linked by N-H...N hydrogen bonds between the noncoordinated amino H atoms and both thiocyanate and pyrimidine N atoms.
authors.affiliation: Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China.
authors.forename: Geng-Geng
authors.initials: GG
authors.lastname: Luo
authors.forename: Di
authors.initials: D
authors.lastname: Sun
authors.forename: Na
authors.initials: N
authors.lastname: Zhang
authors.forename: Rong-Bin
authors.initials: RB
authors.lastname: Huang
authors.forename: Lan-Sun
authors.initials: LS
authors.lastname: Zheng
mesh_terms: D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D008024:Ligands; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D011743:Pyrimidines / Q000737:chemistry*; D018030:Silver Compounds / Q000737:chemistry*
chemical_list: D008024:Ligands; D009942:Organometallic Compounds; D011108:Polymers; D011743:Pyrimidines; D018030:Silver Compounds; C544640:poly((2-amino-4,6-dimethylpyrimidine-kappaN)(mu3-thiocyanato-kappa3N,S,S)silver(I)); C544639:poly((mu2-2-aminopyrimidine-kappa2N1:N3)bis(mu3-thiocyanato-kappa3S,S,S)disilver(I))