Synthesis and crystal structure of a new coordination polymer based on lanthanum and 1,4-phenylenediacetate ligands

Abstract

Reaction in gel between the sodium salt of 1,4-phenylenediacetic acid (Na 2 C 10 O 4 H 8 -Na 2 p-pda) and lanthanum chloride yields single crystals of the three-dimensional coordination polymer poly[[tetraaquatris(μ-1,4-phenylenediacetato) dilanthanum(III)] octahydrate], {[La 2 (C 10 H 8 O 4 ) 3 (H 2 O) 4 ]·8H 2 O}∞. The La III coordination polyhedron can be described as a slightly distorted monocapped square antiprism. One of the two p-pda 2- ligands is bound to four La III ions and the other to two La III ions. Each LaIII atom is coordinated by five ligands, thereby generating a metal-organic framework with potential porosity properties.