About the Book: The sixth edition of this widely used text includes new examples / spectra / explanations / expanded coverage to update the topic of Spectroscopy. The artwork and material in all chapters has been revised extensively for students understanding.New to this EditionNew discussion and new IR, 1H NMR, 13C NMR and Ms spectra. More important basic concepts highlighted and put in boxes throughout this edition. Chapters on 1H NMR and 13C NMR rewritten and enlarged. More on COSY, HETCOR, DEPT and INADEQUATE spectra. A rational approach for solving the structures via fragmentation pathways in Ms. Increased power of the book by providing further extensive learning material in this revised edition. A quick and an easy access to topics in UGC model curricula.With its comprehensive coverage and systematic presentation the book would serve as an excellent text for B.Sc. (Hons.) and M.Sc. Chemistry students. It provides knowledge to excel at any level, university examination, competitive examinations e.g. NET and before interview boards. About the Author: P.S. KALSI is former Dean Colleges, Punjab Technical University, Jalandhar and Professor and Head, Deptt. of Chemistry College of Basic Sciences and Humanities at Punjab Agricultural University Ludhiana. He obtained his Ph.D degree from Poona University under the guidance of Professor S.C. Bhattacharyya at National Chemical Laboratory Poona in 1964. He has published over 135 research papers in national and international journals of repute in the area of Chemistry of Natural Products. Prof. Kalsi was honored by the Punjab Agricultural University in 1969 in recognition of his merit as a teacher. Prof. Kalsi was invited by the Swedish Royal Academy of Sciences to submit proposals for the award of the Nobel Prize for Chemistry for 1985.Prof. Kalsi has participated and delivered plenary / invited lectures at various national and international symposia. Currently Prof. Kalsi is actively involved in post-graduate teaching in different universities / PG Colleges and serves as a UGC resource person to deliver lectures in Refresher Courses. Normally he visits around ten different universities / PG Colleges for this purpose in an academic year. During 2004 itself, up to the date of publication of this text he has already visited six universities and has delivered sixty five lectures of these twenty were delivered at four different refresher courses. Prof. Kalsi is widely travelled abroad on academic missions and is a fellow/member of several national and international professional societies. Contents: Energy-The Electromagnetic Spectrum and the Absorption Spectrum Ultraviolet (UV) and Visible Spectroscopy Infrared Spectroscopy (IR). Proton Nuclear Magnetic Resonance Spectroscopy-1H NMR Carbon-13 NMR Spectro-scopy (13C NMR) Mass Spectrometry (Ms) Spectroscopic Solution of Structural Problems Optical Rotatory Dispersion (ORD) and Circular Dichroism (CD).