Fig. 6. Variations of crystal structures.

Molecular structure overlap of 1a at 50 K (blue) and 300 K (red) at different directions (a, b). Anthracene ring rotates along Mn–O2 bond and forms a dihedral angle of 2.24° between the rings from 300 (red line) to 50 K (blue line), suggesting the rotation of ADC units. H atoms, parts of DMF and water molecules are omitted for clarity.