Connecting...

This is a quick preview of the lesson. For full access, please Log In or Sign up.
For more information, please see full course syllabus of Organic Chemistry Lab

Organic Chemistry Lab Nuclear Magnetic Resonance (NMR) Spectroscopy, Part II

Section 7: Spectroscopy: Lecture 4 | 2:03:48 min

Lecture Description

Next Lecture

Previous Lecture

Discussion
Answer Engine
Download Lecture Slides
Table of Contents

Lecture Comments (57)

	1 answer Last reply by: Professor Starkey Wed Sep 12, 2018 5:05 PM Post by Zohair Badawi on August 30, 2018 What would the degree of unsaturation formula be if there was a Nitrogen or a Halogen in the molecule we're analyzing in the NMR?
	1 answer Last reply by: Professor Starkey Fri Mar 31, 2017 10:06 PM Post by Ay Ayy on March 28, 2017 Hello Dr. I have question why for 13C there are not integration and splitting? thank you
	1 answer Last reply by: Professor Starkey Wed Mar 22, 2017 11:55 AM Post by Ay Ayy on March 21, 2017 Hi Dr. Thank you so much, I have question, in the last practice, in the ring,why carbon double bond attached with ch2 and there are not close together in chemical shift? Thanks
	1 answer Last reply by: Professor Starkey Thu Mar 31, 2016 2:11 PM Post by Adiam Ghebre on March 28, 2016 Good lecture! Is it possible for you to do an example with alkenes and the double bond is between two carbons?
	1 answer Last reply by: Professor Starkey Mon Oct 12, 2015 1:14 AM Post by sania sarwar on October 10, 2015 Hi Dr Starkey, thanks for the lectures, they are really helpful.A question that I wasn't sure of is that in example 2 the benzene ring is a singlet so if CH2 is attached to it, wouldn't that make it a triplet?
	1 answer Last reply by: Professor Starkey Sat Jul 19, 2014 10:28 PM Post by John Subaitani on July 17, 2014 So are we saying that the H-NMR for C10 H14 is para or can it be para, meta. or ortho?
	2 answers Last reply by: Professor Starkey Sat Jul 12, 2014 10:32 AM Post by Francesco Frigo on July 10, 2014 Hello dr. Starkey, at minute 93:41 you define the signal given by proton A as a "clear triplet". But wouldn't proton A couple with Hb with some J value and with Hc with some different J value (since Hb and Hc are chemically different)? So in the end wouldn't this signal look like a doublet of triplets ? Maybe it wouldn't actually be easy to notice since the J values are so similiar but at least we could see some jagged peaks, right?
	1 answer Last reply by: Professor Starkey Sat Mar 22, 2014 12:08 AM Post by in gi seo on March 20, 2014 Are we not going to cover DEPT NMR????
	1 answer Last reply by: Professor Starkey Fri Mar 14, 2014 11:59 AM Post by saima khwaja on March 13, 2014 Hello Dr. Starkey, If it wasn't for your lectures there is no way I would understand this part of organic chemistry. My professor goes really fast and these lectures help me to clarify things in my head. Thank You!
	2 answers Last reply by: Calin Cochran Sun Mar 9, 2014 8:40 PM Post by Calin Cochran on March 4, 2014 Hi Professor Starkey! I know I've told you before, but your lecturing abilities are phenomenal! I can't thank you enough for all the help you have given me! I do have a quick question. My professor for Organic 2 has clumped the second half of NMR, Ketones, Aldehydes, Carbohydrates, and Carboxylic Acids together for our upcoming exam. Your lectures have helped tremendously with all, but I'm a little lacking on the carbohydrates. I wasn't sure if I may have missed it somewhere on this website or we just don't cover it on here. If you have any guidance, I would appreciate it tremendously! Thanks so much! Calin Cochran
	1 answer Last reply by: Professor Starkey Sun Feb 23, 2014 5:27 PM Post by Jia Cheong on February 22, 2014 You are the best!!!!! Be my lecturer! :)
	3 answers Last reply by: Professor Starkey Mon Feb 17, 2014 11:37 PM Post by Udoka Ofoedu on February 17, 2014 hey dr. starkey , Why did u choose hb for only a germinal j value. it has a vicinal j value too ? Please why did u not split that ? Thanks
	1 answer Last reply by: Professor Starkey Sun Jan 12, 2014 12:23 AM Post by Mike Anderson on January 11, 2014 Is there a way to select a lecture and be able to listen to just a part of it? For example it seems if I want to go back the next day and listen to the second part of a lecture, I have to listen to the whole first half of it first. Thanks Mike Anderson
	1 answer Last reply by: Professor Starkey Tue Oct 29, 2013 10:30 PM Post by Joel Barrett on October 28, 2013 Professor Starkey, you are wonderful. I saw your YouTube videos as well. Your hard work is appreciated. I love o-chem just a little bit more because of your videos ;)
	1 answer Last reply by: Professor Starkey Sun Jul 21, 2013 10:52 PM Post by Amy Lin on July 21, 2013 Hi Dr Starkey, I don't have a question. I finished all the lectures and I can't express how much of a help it has been. Your lectures have been really concise and you break it down in a way I can finally understand and work through. I have always had a horrible time with Chemistry and this is the first time I actually feel like I can do this. (And that is a lot given how many times I had to retake Chem...) I am done my subscription and I just wanted to tell you what a big help you have been. Thank you so much. !!!
	1 answer Last reply by: Professor Starkey Wed Jun 5, 2013 10:44 PM Post by Heidi Schmeck on June 5, 2013 Dr. Starkey: Just a quick note to thank you for your informative and engaging lectures. I used educator.com and your lab tutorials (Cal Poly Pomona) as supplemental sources to reinforce my understanding of my Organic Chemistry II coursework. Your detailed and clear explanations of complex concepts helped me earn an "A" in both lecture and lab. Thank you! :)
	1 answer Last reply by: Professor Starkey Mon Feb 25, 2013 10:24 PM Post by Ryan Rod on February 25, 2013 Hi, did you also cover(including IR and NMR of them), Ethers , Epoxides, and Sulfides? how about Aromatic compounds? Sorry I have an exam and panicking!
	1 answer Last reply by: Professor Starkey Wed Feb 20, 2013 9:42 PM Post by JosÃ© MenÃ©ndez on February 19, 2013 Hello Dr. Starkey, I wanted to know if you have a mass spectrometry lecture? Thanks.
	1 answer Last reply by: Professor Starkey Wed Feb 20, 2013 9:44 PM Post by Ryan Rod on February 18, 2013 What about Carbon NMR?? did I miss it, or have you not covered it? BTW, Your are a AMAZING!!
	1 answer Last reply by: Professor Starkey Sun Feb 17, 2013 5:35 PM Post by Amirnikan Eghbali on February 17, 2013 Thanks and a suggestion, it's better if you label doublet triplet etc with small letters (s,d,t) and the other A, B, C, D... that you use for identification with capital letters to avoid confusion.
	1 answer Last reply by: Professor Starkey Fri Dec 14, 2012 11:23 AM Post by Marina Bossi on December 12, 2012 Hi Professor Starkey, I am confused about labelling some functional groups in certain areas of the spectrum where multiple groups can be found. For instance, methyl groups are found at 10-30 and methylene groups at 15-55. How would I know the difference? Thanks
	2 answers Last reply by: alister guerrero Wed Nov 7, 2012 4:02 PM Post by alister guerrero on November 4, 2012 Hi, I just got my account. i was wondering if there is a way to download all the slides together? Thank You
	1 answer Last reply by: Professor Starkey Fri Jul 13, 2012 1:33 PM Post by Gabriella Kaminer-Levin on July 5, 2012 Dear Dr. Starkey: How can one distinguish between two closely spaced singlets, and a doublet with a large coupling constant (J value)? At 73:30 you examine a doublet with a large coupling constant, but how can one be certain that it is a doublet with a large coupling constant rather than two closely spaced singlets (since in this case examining the ratios does not help)? Also, do you have any lectures on Mass Spectrometry? I wasn't sure whether they are included in the course and I just wasn't able to locate it in the Table of Contents. Thank you again for your clear presentation of the material! Gabriella
	1 answer Last reply by: Professor Starkey Mon Apr 9, 2012 11:34 PM Post by Ghazal Fata on April 7, 2012 Dear Professor, First of all, I wanted to thank you for the great lectures you provide. Second, I was wondering if the 13C-NMR is going to be thought in a more complex way in Educator. The organic chem I am enrolled in emphasizes a lot more on how to read 13C-NMR without the help of IR or 1H-NMR and it's really complicated and I'd appreciate it if you provide more videos for us, or just refer me to a place which I can find helpful information. My course actually emphasizes on how different fragments of molecules appear on NMR and which bonds are cleaved and molecular ions are created. Thank you so much, Ghazal F
	1 answer Last reply by: Professor Starkey Tue Mar 27, 2012 11:23 PM Post by Robert Shaw on March 23, 2012 Dr Starkey, My NMR table has aldehydes listed as 9.5 to 9.9 yet yours shows it at just over 8. Which is correct?
	1 answer Last reply by: Professor Starkey Sat Jan 21, 2012 1:06 PM Post by Jason Jarduck on January 20, 2012 Hi DR starkey, I have a question about an NMR. I only have hydrogen NMR with a d20 shake. The question is stating that 3200 - 3500 which specifies an alcohol group. NO OTHER IR INFO. NO C NMR spcetrum is given Find compound A, only H NMR spectrum ION IS 84M/Z USED SULFURIC ACID IN AN ELIMANTION REACTION to form an alkene FIND COMPUND B, only H NMR spectrum This is an assignment question!!! I also have the multiplicities for the hydrogens for compound A and B. How many carbons? I'M CURRENTLY TAKING ORGANIC CHEMISTRY 2 AND THAN I WILL BE TAKING ORGANIC CHEMISTRY 3 LATER. What would be the best strategy to solve this problem!!! Also where can I find a chart with all energy levels in Joules. I enjoy your lecture alot and I'm in a hurry because I have a lab to do for Wensday and I must have this question done for Monday. Thank you Jason Jarduck

Answer EngineGet answers to any question!Ask any question related to Organic Chemistry Lab

Working on the solution...

Nuclear Magnetic Resonance (NMR) Spectroscopy, Part II

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

Intro

¹H NMR Problem-Solving Strategies

Examples

¹H NMR Practice

More About Coupling Constants (J Values)

¹H NMR Advanced Splitting Patterns

¹H NMR Practice

¹³C NMR Spectroscopy

¹³C NMR Spectroscopy

¹³C NMR Chemical Shifts

¹³C NMR Practice

Intro 0:00
¹H NMR Problem-Solving Strategies 0:18

Step 1: Analyze IR Spectrum (If Provided)
Step 2: Analyze Molecular Formula (If Provided)
Step 3: Draw Pieces of Molecule
Step 4: Confirm Piecs
Step 5: Put the Pieces Together!
Step 6: Check Your Answer!

Examples 9:17

Example 1: Determine the Structure of a C₉H₁₀O₂ Compound with the Following ¹H NMR Data
Example 2: Determine the Structure of a C₉H₁₀O₂ Compound with the Following ¹H NMR Data

¹H NMR Practice 20:57

¹H NMR Practice 1: C₁₀H₁₄
¹H NMR Practice 2: C₄H₈O₂
¹H NMR Practice 3: C₆H₁₂O₃
¹H NMR Practice 4: C₈H₁₈

More About Coupling Constants (J Values) 57:11

Vicinal (3-bond) and Geminal (2-bond)
Cyclohexane (ax-ax) and Cyclohexane (ax-eq) or (eq-eq)
Geminal (Alkene), Cis (Alkene), and Trans (Alkene)
Allylic (4-bond) and W-coupling (4-bond) (Rigid Structures Only)

¹H NMR Advanced Splitting Patterns 1:05:39

Example 1: ¹H NMR Advanced Splitting Patterns
Example 2: ¹H NMR Advanced Splitting Patterns
Example 3: ¹H NMR Advanced Splitting Patterns

¹H NMR Practice 1:22:53

¹H NMR Practice 5: C₁₁H₁₇N
¹H NMR Practice 6: C₉H₁₀O

¹³C NMR Spectroscopy 1:44:49

¹³C NMR Spectroscopy

¹³C NMR Chemical Shifts 1:47:24

¹³C NMR Chemical Shifts Part 1
¹³C NMR Chemical Shifts Part 2

¹³C NMR Practice 1:50:16

¹³C NMR Practice 1
¹³C NMR Practice 2

Chemistry: Organic Chemistry Lab

Section 1: Reagent Table
	Completing the Reagent Table for Prelab	21:09
Section 2: Melting Points
	Introduction to Melting Points	16:10
	Melting Point Lab	8:17
Section 3: Recrystallization
	Introduction to Recrystallization	22:00
	Recrystallization Lab	19:07
Section 4: Distillation
	Introduction to Distillation	25:54
	Distillation Lab	24:13
Section 5: Chromatography
	Introduction to TLC (Thin-Layer Chromatography)	28:51
	TLC Analysis Lab	20:50
Section 6: Extractions
	Introduction to Extractions	34:25
	Extraction Lab	14:49
Section 7: Spectroscopy
	Infrared Spectroscopy, Part I	1:04:00
	Infrared Spectroscopy, Part II	48:34
	Nuclear Magnetic Resonance (NMR) Spectroscopy, Part I	1:32:14
	Nuclear Magnetic Resonance (NMR) Spectroscopy, Part II	2:03:48
	Mass Spectrometry	1:28:35

Dr. Laurie Starkey

Nuclear Magnetic Resonance (NMR) Spectroscopy, Part II

Slide Duration:

Table of Contents

Section 1: Reagent Table

Completing the Reagent Table for Prelab

21m 9s

Intro