One‐Dimensional MIIICuII Compounds with an Unprecedented, Tubelike Structural Motif (M = Rare‐Earth Metal)

Unusual structures as well as unusual magnetic behavior are displayed by the compounds with the general formula M2[{CuL}3] (M = rare-earth metal from La to Gd; for CuL, see bottom right) described in this communication. The tubelike structural motif of these compounds is shown here for M = Sm. The NdIII derivative has a diamagnetic ground state, whereas the local spins in the GdIII derivative tend to have a parallel alignment. Such results earmark these compounds as novel materials.