Synthesis, characterization, and crystal structure of the 3-D metal organic framework {[Ba(in)(H2O)6][in]} ∞

Abstract

We present a barium metal–organic framework {[Ba(in)(H2O)6][in]} ∞ prepared via a simple acid–base reaction between BaCO3 and inH (inH = 4-pyridinecarboxylic acid). The complex crystallizes in the monoclinic space group P21/c (a = 6.2592(18), b = 44.289(12), c = 7.2754(15); α = γ = 90, β = 118.890(18); V = 1765.8(8) Å3) displaying an unusual ion association mode with half of the anions metal-bound, whereas the others are associated via a hydrogen-bonded and π ··· π stacking network. Among the coordinated anions, the carboxylate functionalities bridge the metal centers.