A chiral inter-digitated supra-molecular network assembled from single-stranded helical tubes

Abstract

The amino-functionalized helical chiral one-dimensional coordination polymer catena-poly[[bis-(pyridine-N)zinc(II)] μ-2-amino-benzene-1,4- dicarboxyl-ato-κ4 O 1,O 1′:O 4,O 4′], [Zn(C8H5NO 4)(C5H5N)2]n, has an extended structure that is assembled from 2-amino-benzene-1,4-dicarboxyl-ate anions and Zn2+ cations and which presents a left-handed 43 helix with a pitch of 25.6975 (9) Å. All the pyridine rings and all the amino groups point away from the helix to generate a hollow tube with a cross-section of approximately 8 8 Å running parallel to the crystallographic c direction. Each single-stranded helix is inter-digitated with four neighbouring helices via N-H⋯O hydrogen bonds, which gives rise to a dense homochiral three-dimensional supra-molecular network. © 2011 International Union of Crystallography.