21. Cyclohexanediones in general can be used as catalysts in the formation of transition-metal complexes . 22. An example of such an effect is square planar low-spin d 8 transition metal complexes . 23. Polypyridines are multidentate ligands that confer characteristic properties to the metal complexes that they form. 24. Traube was inventive and held many patents in cellulose chemistry and salts of metal complexes . 25. For example, many enzymes are metal complexes , like carboxypeptidase, a hydrolytic enzyme important in digestion. 26. These complexes have a specific structure : photoswitchable organic compounds are attached to metal complexes . 27. The microplastic-metal complex can then enter humans via consumption. 28. The other methodology uses in-solution metal complexes as catalysts. 29. They form transition metal complexes that are highly active catalysts in some olefin polymerization reactions. 30. Thus, the free indicator ( rather than the metal complex ) serves as the endpoint indicator.
