3-Hydroxynaphthalene-2-carboxylic acid supported grid-like structure of cadmium chloride coordination polymer with 1,3-bis(4-pyridyl)propane

Inclusion of 3-hydroxynaphthalene-2-carboxylic acid in grid-like structure of a coordination-polymer 1 formed from 1,3-bis(4-pyridyl)propane (LL) with cadmium(H) chloride is described. Components of the grid are comprised of cyclic secondary building blocks of 4 + 4 condensation of LLs and cadmium ions. Guest 3-Hydroxynaphthalene-2-carboxylic acid (Hnap) molecules possess intramolecular hydrogen bonds and C-H center dot center dot center dot pi and O-H center dot center dot center dot Cl interactions with host coordination polymer. Among four pyridyl rings coordinated to each cadmium ion, two pyridyl rings are distinguishable from other two pyridyl rings as they are involved in C-H center dot center dot center dot Cl interactions. H-1 NMR experiments show that Hnap has a role in formation of grid-like structure. A similar reaction of chelating ligand 2,2'-bipyridine and Hnap with cadmium chloride led to a mono-nuclear complex bis(2,2'-bipyridine)-bis(3-hydroxynaphthalene-2-carboxylato)cadmium(II) (2) which was structurally characterized. (C) 2014 Elsevier B.V. All rights reserved.