21. It is an aromatic compound with a spicy odor. 22. An early examples were derivatives of polycyclic aromatic compounds . 23. Is also used in the fluorination of aromatic compounds , although selective monofluorinations are more difficult: 24. Salicylate is an aromatic compound found in species from both the plant and bacterial kingdoms. 25. They often have inferior aromatic properties, as the aromatic compounds evaporate off during the boil. 26. It undergoes the Friedel-Crafts acylation with aromatic compounds to give the corresponding benzophenones and related derivatives. 27. Chemically, furfural participates in the same kinds of reactions as other aldehydes and other aromatic compounds . 28. Aromatic compounds in fuel contribute to soot production.29. In the 1950s, researchers reported that polycyclic aromatic compounds formed semi-conducting charge-transfer complex salts with halogens. 30. The lower the aniline point, the greater is the content of aromatic compounds in the oil.
