31. Many metal complexes of tropylium ion are known. 32. It is also used to prepare dipicolinato ligated lanthanide and transition metal complexes for ion chromatography. 33. Arene C H bonds are readily activated by metal complexes , as illustrated by directed ortho metalation. 34. Molecular orbital diagram depiction of frontier orbitals in methane and a basic ML 6 metal complex . 35. Most metal carbonyls have volatile; it is one of the most frequently encountered liquid metal complexes . 36. These curves indicate that a spin transition has occurred in a metal complex as temperature changed. 37. Some of these are metal complex chromophores, which contain a metal in a coordination complex with ligands. 38. Pincer type ligands are tridentate ligands that bind three sites on one plane of a metal complex . 39. This was predicted and then confirmed to increase the enantioselectivity and activity of metal complexes of SEGPHOS. 40. This template of writing a metal complex also allows for better comparison of molecules with different charges.