A 10-connected coordination network based on the planar tetranuclear cobalt cluster building blocks: synthesis, structure, and magnetism

A coordination polymer [Co-4(mu(2)-H2O)(2)(1,4-ndc)(4)(dpp)(2)](n) (1) with the 1,4-naphthalenedicarboxylic acid (1,4-H(2)ndc) and 1,3-di(4-pyridyl)propane (dpp) mixed ligands has been synthesized and structurally and magnetically characterized. Compound 1 features a 3D framework based on the tetranuclear [Co-4(mu(2)-H2O)(2)(COO)(6)] secondary building units (SBUs) where the four cobalt ions are coplanar. The 3D coordination network of 1 is a rare 10-connected network of (3(6).4(34).5(3).6(2)) topology based on the tetranuclear cobalt cluster nodes. Magnetic measurements on compound 1 indicate that there is a net antiferromagnetic coupling among the Co(II) ions. (c) 2013 Elsevier B.V. All rights reserved.