The first two-dimensional molecular material Nd(III)-Cu(II) has been synthe
sized by reaction in DMF of [Cu(opba)](2-) and Nd3+. The compound {Nd-2[Cu(
opba)(0.5)(ox)](3). 9DMF}.4.5DMF has been structurally characterized. Its c
rystalline structure can be described as the superposition of honeycomb-lik
e molecular motifs. This material exhibits a quasi nonmagnetic ground state
at low temperature.