Crystal structure of a one-dimensional helical-type silver(I) coordination polymer: catena-poly[[silver(I)-?-N-(pyridin-4-ylmeth-yl)pyridine-3-amine-?(2) N:N'] nitrate dimethyl sulfoxide disolvate].

ABSTRACT: The asymmetric unit of the title compound, {[Ag(C11H11N3)]NO3·2(CH3)2SO} n , comprises one Ag(I) atom, one N-(pyridine-4-ylmeth-yl)pyridine-3-amine ligand, one nitrate anion and two dimethyl sulfoxide mol-ecules. The Ag(I) atoms are bridged by two pyridine N atoms from two symmetry-related ligands, forming a helical chain and adopting a slightly distorted linear coordination geometry [N-Ag-N = 175.37?(8)°]. The helical chain, with a pitch length of 16.7871?(8)?Å, propagates along the b-axis direction. In the crystal, symmetry-related right- and left-handed helical chains are alternately arranged via Ag?Ag inter-actions [3.4145?(4)?Å] and ?-? stacking inter-actions [centroid-centroid distance = 3.650?(2)?Å], resulting in the formation of a two-dimensional supra-molecular network extending parallel to (100). Weak Ag?O [2.775?(2), 3.169?(4) and 2.690?(2)?Å] inter-actions, as well as several N-H?O and C-H?O hydrogen-bonding inter-actions, contribute to the stabilization of the crystal structure. Parts of the dimethyl sulfoxide solvent molecule are disordered over two sets of sites in a 0.937?(3):0.063?(3) ratio.

SUBMITTER: Moon B 

PROVIDER: S-EPMC4257389 | biostudies-other | 2014 Dec

REPOSITORIES: biostudies-other