Extended Data Fig. 2: Schematic representation of the metal vertex opening angles of tetrahedral, cubic and dodecahedral frameworks.
a, Stick view of metal ion positions in the different cage frameworks. b, Opening angles (φ) of the metal vertex of the corresponding tetrahedra35,36, cube37, or dodecahedron shown above, between the metal centre C3 axis (grey dashed line) and the ligand vector defined by the two nitrogen atoms of the chelate plane, measured from their crystal structures. φ was calculated as the complementary angle of the dihedral angle between the five-membered chelate plane and the plane formed by the three neighbouring metal centres (highlighted). Colour code: CoII pink, FeII purple, C light blue, N blue). The presence of bulky methyl group and the expansion of frameworks are inferred to both increase φ.
