Source: https://www.researchgate.net/profile/Colin-Lucas/publication/237864865_Thiophenophane_metal_complexes_IV_Effects_from_ligand_changes_outside_the_coordination_sphere/links/53fdfcad0cf2364ccc09da0b/Thiophenophane-metal-complexes-IV-Effects-from-ligand-changes-outside-the-coordination-sphere.pdf