Isomer dependent self-penetrated topologies and cluster subunits in copper phenylenediacetate coordination polymers with flexible dipyridyl ligands

Abstract

Divalent copper coordination polymers containing flexible dipyridylpropane (dpp) and phenylenediacetate (phda) ligands display different metal cluster subunits and self-penetrated three-dimensional (3-D) topologies, depending on the disposition of the pendant arms within the anionic components. [Cu₂(1,3-phda)₂(dpp)]_n (1) possesses dinuclear {Cu₂(OCO)₄} paddlewheel subunits linked into a 6-connected self-penetrated rob lattice with 4⁸6⁶8 topology. {[Cu₄(1,4-phda)₃(OH)₂(dpp)₂]·2H₂O}_n (2) manifests non-cubane tetrameric {Cu₄(OH)₂}⁶⁺ kernels, connected into an 8-connected self-penetrated ilc lattice with 4²⁴5.6³ topology. Antiferromagnetic coupling within the metal cluster subunits is observed in both 1 and 2.