The First edition of this text includes flavones to suitably update and expand the coverage. All chapters have been significantly explained in order to further clarify the basic concepts and make the interpretation of spectra that much easier. This book written explicitly for Post Graduate students and for new researchers in Natural products. The procedure and techniques employed for characterization of flavones by Elemental analysis, UV-visible spectra, IR Spectra, 1H-NMR Spectra and Mass spectra have been included. The physical parameters and Analytical data of the flavones are discussed. The experimental details of metal complexes, the measurements of Magnetic Susceptibility, Elemental analysis, Solution Conductivity, Electronic Absorption Spectra, Infrared Spectra, Mass Spectra, X-ray diffraction spectra and TG-DTA of metal complexes are given. Biological activity of flavones and their metal complexes have been explained briefly.