https://www.khanacademy.org/science/organic-chemistry/spectroscopy-jay/proton-nmr/v/chemical-shift 2023-12-04T19:02:25.924542584Z Chemical shift The video explains how to calculate chemical shifts in NMR spectroscopy using tetramethylsilane (TMS) as a reference. It emphasizes the importance of TMS's shielding effect and how it affects the frequency of proton absorption. The video also demonstrates how to maintain constant chemical shift values across different spectrometer frequencies. Jay video https://cdn.kastatic.org/googleusercontent/KpVW0E02MLIihmVCjZ6I73ViruA4_8w-DddkHHKrydRmMLDFOn1OtBgSJR8IMs6veiEHhM_q5jg_YXMwnPv_-mID Chemical shift The video explains how to calculate chemical shifts in NMR spectroscopy using tetramethylsilane (TMS) as a reference. It emphasizes the importance of TMS's shielding effect and how it affects the frequency of proton absorption. The video also demonstrates how to maintain constant chemical shift values across different spectrometer frequencies. https://cdn.kastatic.org/ka-youtube-converted/y_sR3OyZUGo.mp4/y_sR3OyZUGo.mp4 351 Basic Principles and Experimental foundations of NMR https://www.khanacademy.org/science/organic-chemistry/spectroscopy-jay/proton-nmr/v/nuclear-shielding 2023-12-04T19:02:25.924542584Z Nuclear shielding The video explains the concept of nuclear shielding in NMR spectroscopy. It details how a proton in a molecule, surrounded by circulating electron density, experiences a smaller effective magnetic field due to the induced magnetic field opposing the applied one. This phenomenon, called shielding, affects the energy difference between the alpha and beta spin states, and consequently, the frequency absorbed by the proton. Jay video https://cdn.kastatic.org/googleusercontent/wjCOf5zCV3cQnqLt4QpSQVZFi2AbMkRR86K48gJApy2HCiaKd_A7kzDoACUu5FRU2YWcIFmHFIxKVs75gV6-grun5g Nuclear shielding The video explains the concept of nuclear shielding in NMR spectroscopy. It details how a proton in a molecule, surrounded by circulating electron density, experiences a smaller effective magnetic field due to the induced magnetic field opposing the applied one. This phenomenon, called shielding, affects the energy difference between the alpha and beta spin states, and consequently, the frequency absorbed by the proton. https://cdn.kastatic.org/ka-youtube-converted/rFmAWQSiqRo.mp4/rFmAWQSiqRo.mp4 622 Basic Principles and Experimental foundations of NMR https://www.khanacademy.org/science/organic-chemistry/spectroscopy-jay/proton-nmr/v/proton-nmr-practice-3 2021-03-22T03:07:31Z Proton NMR practice 3 More practice determining the structure of a molecule from the molecular formula, hydrogen deficiency index, and proton NMR spectrum. Uses example of ethanol. Jay video https://cdn.kastatic.org/googleusercontent/WsB0iku3hdWgdKlaNBCOW3O-AVrodDbejKVJGDGsPWnMHUguf1ZqYyoWWy1d-9T07XquLscp1HyBlrmjze90Bw0CHQ Proton NMR practice 3 More practice determining the structure of a molecule from the molecular formula, hydrogen deficiency index, and proton NMR spectrum. Uses example of ethanol. https://cdn.kastatic.org/ka-youtube-converted/15fz6Wo84IA.mp4/15fz6Wo84IA.mp4 443 Basic Principles and Experimental foundations of NMR https://www.khanacademy.org/science/organic-chemistry/spectroscopy-jay/proton-nmr/v/electronegativity-and-chemical-shift 2023-12-04T19:02:25.924542584Z Electronegativity and chemical shift This video breaks down how protons in different environments exhibit varying chemical shifts in NMR spectroscopy. It explains how factors like electronegativity, hybridization, and hydrogen bonding influence shielding or deshielding of protons, affecting their energy states and the frequency signals they emit. Jay video https://cdn.kastatic.org/googleusercontent/08HnGLWJSzyeegJlsiMNIU_dwoHtWzohcULRApzANEhkHL4o5_XatDYyWYk1es3z5VDfysRQX6Gni9MdIvsSQmKtNA Electronegativity and chemical shift This video breaks down how protons in different environments exhibit varying chemical shifts in NMR spectroscopy. It explains how factors like electronegativity, hybridization, and hydrogen bonding influence shielding or deshielding of protons, affecting their energy states and the frequency signals they emit. https://cdn.kastatic.org/ka-youtube-converted/CI84wFXN_Vg.mp4/CI84wFXN_Vg.mp4 662 Basic Principles and Experimental foundations of NMR https://www.khanacademy.org/science/grade-12-chemistry-snc-aligned/x7a43e770fc9e15cf:nuclear-magnetic-resonance-nmr/x7a43e770fc9e15cf:basic-principles-and-experimental-foundations-of-nmr/e/proton-nuclear-magnetic-resonance-questions 2021-06-05T02:06:01Z Proton nuclear magnetic resonance questions Questions pertaining to proton nuclear magnetic resonance examsherpa exercise