Ligand effects on the dimensionality of oxamato-bridged mixed-metal open-framework magnets

Increasing dimensionality [from 2D (1) to 3D (2)] and T-C [from 10 (1) to 20 K (2)] in two new oxamato-bridged heterobimetallic (Mn2Cu3II)-Cu-II open-frameworks result from the steric hindrance provided by the different alkyl substituents of the N-phenyloxamate bridging ligands.