title: catena-Poly[[(di-2-pyridylamine)silver(I)]-mu-nicotinato] and catena-poly[[(di-2-pyridylamine)silver(I)]-mu-2,6-dihydroxybenzoato].
abstract: In catena-poly[[(di-2-pyridylamine-kappa(2)N,N')silver(I)]-mu-nicotinato-kappa(2)N:O], [Ag(C(6)H(4)NO(2))(C(10)H(9)N(3))](n), the Ag(I) atom is tetracoordinated by two N atoms from the di-2-pyridylamine (BPA) ligand [Ag-N = 2.3785 (18) and 2.3298 (18) angstroms] and by one N atom and one carboxylate O atom from nicotinate ligands [Ag-N = 2.2827 (15) angstroms and Ag-O = 2.3636 (14) angstroms]. Bridging by nicotinate N and O atoms generates a polymeric chain structure, which extends along [100]. The carboxyl O atom not bonded to the Ag atom takes part in an intrachain C-H...O hydrogen bond, further stabilizing the chain. Pairs of chains are linked by N-H...O hydrogen bonds to generate ribbons. There are no pi-pi interactions in this complex. In catena-poly[[(di-2-pyridylamine-kappa(2)N,N')silver(I)]-mu-2,6-dihydroxybenzoato-kappa(2)O(1):O(2)], [Ag(C(7)H(5)O(4))(C(10)H(9)N(3))](n), the Ag(I) atom has a distorted tetrahedral coordination, with three strong bonds to two pyridine N atoms from the BPA ligand [Ag-N = 2.286 (5) and 2.320 (5) angstroms] and to one carboxylate O atom from the 2,6-dihydroxybenzoate ligand [Ag-O = 2.222 (4) angstroms]; the fourth, weaker, Ag-atom coordination is to one of the phenol O atoms [Ag...O = 2.703 (4) angstroms] of an adjacent moiety, and this interaction generates a polymeric chain along [100]. Pairs of chains are linked about inversion centers by N-H...O hydrogen bonds to form ribbons, within which there are pi-pi interactions. The ribbons are linked about inversion centers by pairs of C-H...O hydrogen bonds and additional pi-pi interactions between inversion-related pairs of 2,6-dihydroxybenzoate ligands to generate a three-dimensional network.
authors.affiliation: Laboratory of Inorganic Chemistry, China Pharmaceutical University, Nanjing 210009, People's Republic of China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Wang
authors.forename: Nobuo
authors.initials: N
authors.lastname: Okabe