Air-stable four-coordinate cobalt(<scp>ii</scp>) single-ion magnets: experimental and <i>ab initio</i> ligand field analyses of correlations between dihedral angles and magnetic anisotropy

Magneto-structural correlations for air-stable four-coordinate Co( ii ) complexes reveal the dependence of magnetic properties on the dihedral twist angle and establish valuable design guidelines for achieving high magnetic anisotropy.