Practice determining the structure of a molecule from the molecular formula, hydrogen deficiency index, and proton NMR spectrum. Uses example of ethylbenzene. Created by Jay. Watch the next lesson: https://www.khanacademy.org/science/organic-chemistry/spectroscopy-jay/proton-nmr/v/proton-nmr-practice-2?utm_source=YT&utm_medium=Desc&utm_campaign=organicchemistry Missed the previous lesson? https://www.khanacademy.org/science/organic-chemistry/spectroscopy-jay/proton-nmr/v/hydrogen-deficiency-index?utm_source=YT&utm_medium=Desc&utm_campaign=organicchemistry Organic Chemistry on Khan Academy: Carbon can form covalent bonds with itself and other elements to create a mind-boggling array of structures. In organic chemistry, we will learn about the reactions chemists use to synthesize crazy carbon based structures, as well as the analytical methods to characterize them. We will also think about how those reactions are occurring on a molecular level with reaction mechanisms. Simply put, organic chemistry is like building with molecular Legos. Let's make some beautiful organic molecules! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Organic Chemistry channel: https://www.youtube.com/channel/UCNKPjijOc0WEJ7DIV_Vay3g?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 583744 Khan Academy Organic Chemistry
What is nmr or nuclear magnetic resonance spectroscopy ,its basic principle , nmr equation, interpretation of nmr spectra, chemical shift ,splitting of signals ,spin- spin coupling , coupling constant ,effect of shielding and deshielding on nmr signals
Views: 100773 Priyanka Jain
http://leah4sci.com/organicchemistry Presents: H-NMR How To Analyze Peaks Are you struggling with organic chemistry? Download my free ebook "10 Secrets To Acing Organic Chemistry" here: http://leah4sci.com/orgo-ebook/ This video takes you through the four key aspects you need to understand when interpreting the peaks of an H-NMR graph - Number and type of unique hydrogen - splitting of peaks - hydrogen neighbors - chemical shifts Future videos will take you through specific NMR problems and solving techniques View them here: http://leah4sci.com/organic-chemistry-video-and-quiz-library/ I also offer 1-1 online organic chemistry tutoring. More information here: http://leah4sci.com/organic-chemistry-tutor/
Views: 680826 Leah4sci
Looking for some more organic chemistry practice? Try http://www.studyorgo.com and ace that test. Use the coupon code “Dave” and save 20% right away! What are these things?! All the lines! Splitting? Integration? This is the most confusing thing I've ever seen! OK, take it easy chief. Let Professor Dave take you through the very basics of interpreting NMR spectra. Subscribe: http://bit.ly/ProfDaveSubscribe [email protected] http://patreon.com/ProfessorDaveExplains http://professordaveexplains.com http://facebook.com/ProfessorDaveExpl... http://twitter.com/DaveExplains General Chemistry Tutorials: http://bit.ly/ProfDaveGenChem Organic Chemistry Tutorials: http://bit.ly/ProfDaveOrgChem Biochemistry Tutorials: http://bit.ly/ProfDaveBiochem Classical Physics Tutorials: http://bit.ly/ProfDavePhysics1 Modern Physics Tutorials: http://bit.ly/ProfDavePhysics2 Mathematics Tutorials: http://bit.ly/ProfDaveMaths Biology Tutorials: http://bit.ly/ProfDaveBio American History Tutorials: http://bit.ly/ProfDaveAmericanHistory
Views: 252178 Professor Dave Explains
Please watch: "How to draw Chemical reactions in ChemDraw?" https://www.youtube.com/watch?v=wIadMjkMNes -~-~~-~~~-~~-~- Spectroscopy is one of the important field of science where one can find out which kind of species are present in a matter. There are various types of spectroscopic Technics are there to detect the bonding and molecular structure of a organic compound. example Infrared (IR) Spectroscopy detects the functional groups present the compound, H-NMR or C-NMR or other NMR spectroscopies detects the environment of that species. Along with you have AAS, FES, UV-VIS, ESR or EPR spectroscopy etc.
Views: 334 Dr. Sadu Suryakant S
Spin-spin coupling between adjacent protons cause the peaks to split in to n+1 peaks. Note that the area under the peaks is related to the ratio of protons in different environments -- not the height of the peaks.
Views: 70500 Richard Thornley
Introduction to basic organic laboratory equipment and techniques. http://www.ncsu.edu/chemistry/
In this video I determine a plausible chemical structure for an organic compound based on the given IR and H NMR spectra. For a copy of the tables I used, click here: https://drive.google.com/open?id=0BwOceMKQTVFxRTh1Szl4aTh0eE0
Views: 177379 Tony St. John
Processing, interpreting, and generating reports of NMR datasets containing both 1D and 2D spectra (1H, 13C, HSQC, HMBC, COSY, etc), can be a time-consuming endeavour. This video shows you how to complete these steps in seconds using ACD/Labs processing tools. If you'd like to learn more, our webinars are available to watch on-demand at https://acdlabs.com/webinars Or you can find out more about our spectral analysis tools for NMR at https://acdlabs.com/nmr
Views: 244 ACDLabs
Number of Signals in NMR, NMR Signal for Methanol, NMR Signal for Ethanol, NMR Signal for Cyclohexane, NMR Signal for 1,1 Di-bromoethane, NMR Signal for 2-Chloropropene, NMR Signal for Methyl Cyclopropane. Website: http://www.gdc4gpat.com Download GDC App: https://play.google.com/store/apps/de... Online Test Series: http://www.gdconlinetest.in
Views: 11665 Dr. Puspendra Classes
How to predict and draw the hydrogen (1H) NMR spectrum of an alcohol (ethanol). Find the equivalent hydrogens, determine the peak splitting and then draw each set of peaks at the appropriate chemical shift. Check me out: http://www.chemistnate.com
Views: 79313 chemistNATE
Let's take another look at some H-NMR spectra to get a little more practice. What do we do with protons on an alkene? How do we predict a spectrum from a structure? How do we predict a structure from a spectrum? Practice makes perfect! Want to play around with ChemDoodle? Get a copy here: https://www.chemdoodle.com/ Subscribe: http://bit.ly/ProfDaveSubscribe [email protected] http://patreon.com/ProfessorDaveExplains http://professordaveexplains.com http://facebook.com/ProfessorDaveExpl... http://twitter.com/DaveExplains General Chemistry Tutorials: http://bit.ly/ProfDaveGenChem Organic Chemistry Tutorials: http://bit.ly/ProfDaveOrgChem Biochemistry Tutorials: http://bit.ly/ProfDaveBiochem Biology Tutorials: http://bit.ly/ProfDaveBio Classical Physics Tutorials: http://bit.ly/ProfDavePhysics1 Modern Physics Tutorials: http://bit.ly/ProfDavePhysics2 Mathematics Tutorials: http://bit.ly/ProfDaveMaths American History Tutorials: http://bit.ly/ProfDaveAmericanHistory
Views: 6449 Professor Dave Explains
Number of Signals in NMR Spectrum, Splitting of Signals in NMR Spectroscopy, NMR Spectroscopy. Website: http://www.gdc4gpat.com Download GDC App: https://play.google.com/store/apps/details?id=in.gdc4gpat&hl=en Online Test Series: http://www.gdconlinetest.in
Views: 7959 Dr. Puspendra Classes
In this video series I'll teach the techniques I use to interpret NMR spectra. If you watch the complete series, you'll have all the skills you need to interpret just about any NMR spectrum. In this video you'll learn how to handle disubstituted benzenes, aldehydes, ethers, and various other functional groups. If this video is too advanced for you, you may be missing some basic NMR theory. Check out this video series from my friend Frank Wong: https://www.youtube.com/watch?v=9orcRVTKcS0 Other Links! Proton NMR chemical shifts: http://andromeda.rutgers.edu/~huskey/images/nmr_h_table.png Proton NMR of benzaldehyde: http://www.ces.clemson.edu/IMMEX/backup/asif/Spectra/Case1/example_spectra/ex_bd_hnmr.htm Proton NMR of p-methoxybenzaldehyde: http://www.azom.com/images/Article_Images/ImageForArticle_11354(2).jpg
Views: 77920 Janci Despain
In this tutorial we look at the advantages of using a DEPT-edited-HSQC over HSQC and HMQC. We also introduce DEPTQ for looking at carbon 13 spectra and how that can be utilised with the DEPT-ed-HSQC spectrum. This is part 1 of a 2 part tutorial on HSQC. In this tutorial we analyse menthol and in part 2 we look at the tripeptide that was analysed in the NOESY tutorial. For downloadable worksheets on this tutorial visit: http://www.epistemeo.com The NMR software used in this tutorial for the 1D NMR spectra was MNova and a link to the Mestrelab website can be found at: http://www.mestrelab.com
Views: 47284 chemtubeuk
This organic chemistry video provides a review of H NMR spectroscopy. It provides plenty of examples and multiple choice practice problems that you might encounter on your next test or exam. It discusses chemical shifts for common functional groups such as aldehydes, carboxylic acids, ethers, alkyl halides, and aromatic benzene rings. It provides a review of the H NMR signals and the spin spin splitting pattern of the n+1 rule that you need to know. It also shows you how to determine the number of signals in an h nmr spectrum and discusses the terms upfield and downfield so you can understand it. Here is a list of topics: 1. Common Chemical Shifts / H NMR Table Values 2. How To Find The Number of Signals 3. N + 1 rule - Spin Spin Splitting 4. How To Identify Identical Hydrogen Atoms 5. How To Draw a HMR Signals /Spectrum 6. Upfield vs Downfield 7. H-NMR Analysis and Integration
Views: 131190 The Organic Chemistry Tutor
In this tutorial we look at how to interpret a NOESY NMR spectrum using a tripeptide as an example. 2D homogeneous NOE spectroscopy (NOESY) is a widely used experiment for looking at dipolar coupling between homonuclei such as H-H coupling. Because it relies on intramolecular (through space) interactions rather than through bond interactions it is extremely useful for assigning connectivities between spin systems and also for confirming the 3D structure of molecules. More information and worksheets can be found on Epistemeo. It is free to join, watch tutorial videos and download material. http://www.epistemeo.com
Views: 78291 chemtubeuk
Visit our website for the notes of this lecture: https://knowbeetutoring.wordpress.com/ Get private tutoring from anywhere in the world, via your computer, from this instructor. He offers help in Organic Chemistry, General Chemistry, Physics, MCAT, PCAT, and DAT. SUBMIT AN MCAT PROBLEM AND I WILL SHOW YOU HOW TO SOLVE IT VIA VIDEO. FREE. VISIT WEBSITE FOR DETAILS. https://knowbeetutoring.wordpress.com/
Views: 78133 Knowbee
This organic chemistry video tutorial provides a review of IR Infrared Spectroscopy and how you can use it to distinguish one molecule from another according to their functional groups. This video contains plenty of lecture notes as well as a few multiple choice practice problems that will help you for your next organic chemistry test or exam. Here's the link for the complete video: https://vimeo.com/ondemand/irspectroscopyreview General Chemistry Video Playlist: https://www.youtube.com/watch?v=n5vjCqnVb6s&index=1&t=25s&list=PL0o_zxa4K1BU3gxU8RwqkEET2ilZ80Znj Access to Premium Videos: https://www.patreon.com/MathScienceTutor Facebook: https://www.facebook.com/MathScienceTutoring/ Here is a list of topics covered in this video: 1. Introduction to IR Spectroscopy 2. Absorption of IR energy - Molecular Vibrations - Stretching, Compression, & Bending 3. Concept of Transmittance and Absorbance 4. Relationship Between Wavelength, Wavenumber cm^-1, Frequency, and Energy 5. Signal Characteristics Shape: Broad vs Sharp 6. Signal Intensity: Weak, Medium, or Strong 7. The effect of hydrogen bonding and bond polarity on signal shape and intensity 8. Diagnostic / Functional Group Region vs Fingerprint Region 9. The Relationship Between The Mass of the Atom and The Wavenumber 10. Relationship Between Bond Strength and Wavenumber 11. The Effect of Conjugation on IR Frequency Absorption 12. IR Spectrum For Alkanes, Alkenes, & Alkynes 13. IR Spectrum of an Internal Alkyne vs a Terminal Alkyne 14. IR Active vs IR Inactive Compounds - Symmetrical & Assymetrical Bonds 15. Electric Field, Force, & Dipole Moments - IR Bond Stretch vs Compression 16. IR Spectrum of a Carboxylic Acid vs an Alcohol - OH Stretch 17. IR Spectrum of Aldehydes & Ketones: C=O Carbonyl Stretch @ 1700 cm^-1 18. IR Graph of Esters and Ethers: C-O Stretch @ 1000 to 1300. Sp2 vs Sp3 Hybridized Carbon 19. IR Graph of Primary and Secondary Amines: Single vs Double Peak at 3300 & 3400 cm^-1 Symmetric and Assymetric Stretching of NH2 Hydrogen Atoms. 20. IR Spectrum of Amides & Nitriles 21. Carbonyl C=O Stretch - Resonance Electron Donating Groups vs Inductive Electron Withdrawing Groups 22. IR Spectrum of Aromatic Benzene Ring Derivatives C=C & =CH Stretch
Views: 197794 The Organic Chemistry Tutor
CHECK OUT THE FIRST PRACTICE PROBLEM: https://www.youtube.com/watch?v=j21CAxsU30U CHECK OUT THE THIRD PRACTICE PROBLEM: https://www.youtube.com/watch?v=rUiRt... CHECK OUT SECOND PRACTICE PROBLEM: https://www.youtube.com/watch?v=8Nrz_... Have you subscribed? it is free :) In this video, I will do a full walk-through for a typical organic exam question, how to derive organic structure from spectroscopic data given such as H NMR, C NMR, IR spectroscopy and mass spectroscopy. Due to popular demand, I've uploaded the part 2 of this series. I hope you guys find this video beneficial. Part 3 is coming up as well. How to interpret C NMR? How to interpret H NMR? What is proton NMR? What is carbon NMR? Practice problem H NMR/ C NMR How to identify organic structure from H NMR How to identify organic structure from C NMR How to identify organic structure from Carbon NMR How to identify organic structure from proton NMR How to identify organic structure from Mass spectroscopy How to identify organic structure from IR spectroscopy H NMR practice problem C NMR practice problem IR spectroscopy practice problem Mass spectroscopy practice problem Determine organic structure from IR Determine organic structure from NMR Determine organic structure from C NMR Determine organic structure from Mass spectroscopy
Views: 3972 Hamed Hosseini
NMR spectroscopy lecture by Suman Bhattacharjee - This lecture explains about the NMR spectroscopy basics. Nuclear magnetic resonance spectroscopy, most commonly known as NMR spectroscopy, is a research technique that exploits the magnetic properties of certain atomic nuclei. It determines the physical and chemical properties of atoms or the molecules in which they are contained. It relies on the phenomenon of nuclear magnetic resonance and can provide detailed information about the structure, dynamics, reaction state, and chemical environment of molecules. The intramolecular magnetic field around an atom in a molecule changes the resonance frequency, thus giving access to details of the electronic structure of a molecule. Most frequently, NMR spectroscopy is used by chemists and biochemists to investigate the properties of organic molecules, although it is applicable to any kind of sample that contains nuclei possessing spin. Suitable samples range from small compounds analyzed with 1-dimensional proton or carbon-13 NMR spectroscopy to large proteins or nucleic acids using 3 or 4-dimensional techniques. The impact of NMR spectroscopy on the sciences has been substantial because of the range of information and the diversity of samples, including solutions and solids. NMR spectra are unique, well-resolved, analytically tractable and often highly predictable for small molecules. Thus, in organic chemistry practice, NMR analysis is used to confirm the identity of a substance. Different functional groups are obviously distinguishable, and identical functional groups with differing neighboring substituents still give distinguishable signals. NMR has largely replaced traditional wet chemistry tests such as color reagents for identification. A disadvantage is that a relatively large amount, 2–50 mg, of a purified substance is required, although it may be recovered. Preferably, the sample should be dissolved in a solvent, because NMR analysis of solids requires a dedicated MAS machine and may not give equally well-resolved spectra. The timescale of NMR is relatively long, and thus it is not suitable for observing fast phenomena, producing only an averaged spectrum. Although large amounts of impurities do show on an NMR spectrum, better methods exist for detecting impurities, as NMR is inherently not very sensitive. NMR spectrometers are relatively expensive; universities usually have them, but they are less common in private companies. Modern NMR spectrometers have a very strong, large and expensive liquid helium-cooled superconducting magnet, because resolution directly depends on magnetic field strength. Less expensive machines using permanent magnets and lower resolution are also available, which still give sufficient performance for certain application such as reaction monitoring and quick checking of samples. There are even benchtop NMR spectrometers. This important and well-established application of nuclear magnetic resonance will serve to illustrate some of the novel aspects of this method. To begin with, the nmr spectrometer must be tuned to a specific nucleus, in this case the proton. The actual procedure for obtaining the spectrum varies, but the simplest is referred to as the continuous wave (CW) method. A typical CW-spectrometer is shown in the following diagram. Article source - Wikipedia.org For more information, log on to- http://www.shomusbiology.com/ Get Shomu's Biology DVD set here- http://www.shomusbiology.com/dvd-store/ Download the study materials here- http://shomusbiology.com/bio-materials.html Remember Shomu’s Biology is created to spread the knowledge of life science and biology by sharing all this free biology lectures video and animation presented by Suman Bhattacharjee in YouTube. All these tutorials are brought to you for free. Please subscribe to our channel so that we can grow together. You can check for any of the following services from Shomu’s Biology- Buy Shomu’s Biology lecture DVD set- www.shomusbiology.com/dvd-store Shomu’s Biology assignment services – www.shomusbiology.com/assignment -help Join Online coaching for CSIR NET exam – www.shomusbiology.com/net-coaching We are social. Find us on different sites here- Our Website – www.shomusbiology.com Youtube- https://www.youtube.com/user/TheFunsuman Thank you for watching NMR spectroscopy lecture by Suman Bhattacharjee.
Views: 324308 Shomu's Biology
For this one we need to be able to interpret NMR data in order to arrive at the correct molecular structure based on an empirical formula. It's not as hard as it sounds! Subscribe: http://bit.ly/ProfDaveSubscribe [email protected] http://patreon.com/ProfessorDaveExplains http://professordaveexplains.com http://facebook.com/ProfessorDaveExpl... http://twitter.com/DaveExplains General Chemistry Tutorials: http://bit.ly/ProfDaveGenChem Organic Chemistry Tutorials: http://bit.ly/ProfDaveOrgChem Biochemistry Tutorials: http://bit.ly/ProfDaveBiochem Classical Physics Tutorials: http://bit.ly/ProfDavePhysics1 Modern Physics Tutorials: http://bit.ly/ProfDavePhysics2 Mathematics Tutorials: http://bit.ly/ProfDaveMaths Biology Tutorials: http://bit.ly/ProfDaveBio American History Tutorials: http://bit.ly/ProfDaveAmericanHistory
Views: 31132 Professor Dave Explains
For a lot more videos, worksheets, problem sessions and 3D models on chemistry check out Epistemeo. It's FREE. http://www.epistemeo.com In this NMR tutorial we look at the COSY spectrum. In the COSY spectrum it is possible to obtain the connectivity of carbon atoms based on the hydrogens that they have attached to them. Here we will look at how the spectrum has its charcteristic pattern and how we can interpret that pattern to deduce the structure of a molecule.
Views: 97898 chemtubeuk
Griti is a learning community for students by students. We build thousands of video walkthroughs for your college courses taught by student experts who got an A+. SUBSCRIBE to the channel and explore overviews for every concept in your calculus, chemistry and physics courses for FREE! Register at www.GRITI.co REQUEST VIDEOS FOR MORE HELP? + get thousands of study problems for exam prep
Views: 6819 Griti
This video is about the basics tips that can be learned to predict Proton NMR spectral graph of any compound. Here ethyle acetate has been explained . Proton NMR is a type of Nuclear Magnetic Resonance Spectroscopy which can be used to determine structure of any compound. In Life Sciences research this spectroscopy is used to determine the structure of peptides and proteins in solution. For any type of queries regarding the concept leave a comment below. If you like this then subscribe and share this video .
Views: 1859 BASICS OF LIFE SCIENCES
In this tutorial we look at the HMBC spectrum for the tripeptide that was studied in the NOESY tutorial. Downloadable worksheets for this tutorial are available on Epistemeo (Chemtube, Organic Chemistry, NMR): http://www.epistemeo.com
Views: 24975 chemtubeuk
For a lot more videos, worksheets, problem sessions and 3D models on chemistry check out Epistemeo. It's FREE. http://www.epistemeo.com In this NMR tutorial we look at the TOCSY spectrum. In the TOCSY spectrum it is possible to obtain information about the spin systems in your molecule. Here we will look at how the spectrum has its charcteristic pattern and how we can interpret that pattern to deduce the structure of a molecule and all of the spins systems.
Views: 26684 chemtubeuk
Understandings: In a high resolution 1H NMR spectrum, single peaks present in low resolution can split into further clusters of peaks. Guidance: Students should be able to interpret the following from 1H NMR spectra: number of peaks, area under each peak, chemical shift and splitting patterns. Treatment of spin-spin coupling constants will not be assessed but students should be familiar with singlets, doublets, triplets and quartets.
Views: 10982 Mike Sugiyama Jones