 I am MS Balakrishna, professor of chemistry at IIT Bombay. I have been teaching main group chemistry, transformational chemistry, structure and bonding aspects and interpretive spectroscopy. My research interests are main group chemistry with emphasis on phosphines and phosphorus nitrogen compounds, coordination and argumentary chemistry, homogeneous catalysis and biological studies involving gold and copper compounds. So I am delighted to be here once again in front of you presenting another important course under NPTEL program titled interpretative spectroscopy. If you recall, previously I made two lecture series, one on main group chemistry and other one is advanced transformational chemistry. On both the occasions, many of them who took those courses or listened to lectures requested me to give insight into the methods of characterization with emphasis on spectroscopic methods and interpretation of data in a simple and easy manner without having much theoretical knowledge. Although I had decided to incorporate interpretive spectroscopy into these two courses, because of several topics I had to cover in those lectures, I could not get a time and always I felt that these two courses lack that interpretive part. So in this context, I decided to float this course to focus exclusively on interpretive aspects of four important spectroscopic methods, such as NMR, UV visible, IR and mass spectrometry. So I am here with this package as a part of this course without digging deep into theoretical aspects. I shall try to make you familiar with the interpretation of multi-nuclear NMR, UV visible and IR spectra and also mass spectral data. These are very powerful tools, not only for synthetic chemists working in the areas of inorganic, organic and organometallic chemistry and homogeneous catalysis, but are equally important for biochemists and also those who are working in the area of environmental science, materials, forensic science, chemical and pharmaceutical industries and also those who are working in R&D laboratories. Apart from these, this course is even more useful for those who are studying BSC, MSC in chemistry and biochemistry and also for PhD students and more importantly for those who are preparing for JOM, GATE and CSI examinations. So in NMR, I shall give examples of most of the NMR active nuclei with emphasis on 1H, 13C, 19F, 31P and also considering nitrogen, both 14N, 15N, boron, silicon, lithium, platinum, rhodium, selenium and mercury and whatnot. It's a very interesting and useful course. I have included numerous examples to interpret multi-nuclear NMR and at the end of this lecture series, I devote at least five to six lectures to solve problems containing all these four spectral data. I'm sure you like it and learn interpretation of structure of new molecules with authority and with easy method. I shall tell you one more thing. As long as you have greed for learning, I come up with courses like this. When you think that you have learned something from this course and benefited in achieving your objectives that brings immense satisfaction to me and also it inspires me to do more in this direction. This makes me even more humble student of learning. The reason why I tell is I never call myself as a teacher but I want to remain as a best student of learning. Whenever I float some courses like this or go to classroom and teach, always they make me having more greed for learning more. So with this, I welcome you all wholeheartedly to this course, Interpretive Spectroscopy. Thank you and see you soon. Hello, everyone. I am Kilesh Chandru Divedi. I completed my master's degree from Luxembourg-Singhmer Government PG College, Pythoragal, which is affiliated to Kuma University in the Nital, Uttarakhand. After that, I appeared for CSIR net exam and I secured all linear rank 11th. Currently, I am doing my PhD from IIT Bombay under the supervision of Professor M.S. Balagrishnan. My research interest includes synthesis of phosphorus and nitrogen based monodentate to polydentate ligands as well as their metal complexes and find out their applications, especially in homogeneous catalysis. It's my pleasure to be associated as a TA with this course titled as Interpretive Spectroscopy. Thank you. Hello, everyone. I am Ghazal Sabarwal. I have completed my master's from DAV College Chandigarh, which is affiliated to Punjab University. Currently, I am pursuing my PhD from IIT Bombay under the supervision of Professor M.S. Balagrishnan. My research interest includes synthesizing phosphorus and nitrogen based ligands and their transition metal complexes and then studying their photophysical and catalytic applications. Earlier, I was associated as a TA for the previous course run by Professor M.S. Balagrishnan titled as Advanced Transition Metal Chemistry and it's my immense pleasure to be again given the opportunity to be a TA for this new course brought to you by Professor M.S. Balagrishnan, which is titled as Interpretative Spectroscopy. Thank you.