Abstract
Publisher Summary This chapter focuses on aromatic and heteroaromatic rings. All the modes of vibration of a monosubstituted benzene ring are illustrated in the chapter. The chapter reviews the general appearance of monosubstituted benzenes and ortho, meta, and para substituted benzenes in the infrared spectrum. It further illustrates the ring modes of benzene1-10 and the modes for mono, ortho, meta, and para substitued benzenes in the 1600 and 1500 cm−1 regions. The chapter presents the characteristic bands for substituted naphthalenes and pyridine compounds. Five-membered ring heteroaromatic compounds with two double bonds in the ring show three ring stretching bands near 1590, 1490, and 1400 cm−1. The chapter reviews the metal complexes of the cyclopentadienyl ring with a large number of different metals and illustrates the bands for the cyclopentadienyl ring.
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