Structure and magnetic properties of a copper malonate/dipyridylamine layered coordination polymer with both syn-anti and anti-anti copper carboxylate chains

The 2-D coordination polymer {[Cu2(malonate)2(dpa)(H2O)2] · H2O} (dpa = 4,4′-dipyridylamine) is composed of alternating syn-anti and anti-anti copper malonate 1-D chains linked into a (6,3) herringbone layer motif through tethering dpa ligands. Variable temperature magnetic studies indicate weak ferromagnetic coupling through the 1-D copper malonate chains with J = 0.64(1) cm−1 and g = 2.033(4).