CHEM 40A

UCSD

Course Overview

Lessons & Practice

I. Welcome

2 min

1. Introduction to Organic Structure and Bonding I

1.2hr

1.1.1. Lewis Structures and Formal Charges9 min

1.1.2. How to Draw Lewis Structures5 min

1.1.3. Example: Lewis Structures5 min

1.1.4. Example: Lewis Structures5 min

1.1.5. Practice: Lewis Structures2 min

1.1.6. Practice: Lewis Structures5 min

1.2.1. Drawing Organic Compouds in 2D2 min

1.2.2. Example: 2-D Notation2 min

1.2.3. Example: 2-D Notation1 min

1.2.4. Summary Sheet: Representing Molecules in Different 2D Notation

1.2.5. Summary Sheet: Condensed Formula

1.2.6. Drawing Organic Compounds in 3D5 min

1.2.7. Example: 3-D Notation2 min

1.2.8. Example: 3-D Notation2 min

1.2.9. Summary Sheet: Drawing in 3-Dimensions

1.3.1. Summary Sheet: Common Organic Functional Groups

1.3.2. Example: Functional Groups 2 min

1.3.3. IUPAC Systematic Naming Theory15 min

1.3.4. Example: Converting Names to Structures2 min

1.3.5. Example: IUPAC Systematic Naming2 min

1.3.6. Example: IUPAC Systematic Naming2 min

1.3.7. Practice: IUPAC Systematic Naming2 min

1.3.8. Practice: IUPAC Systematic Naming2 min

1.3.9. Summary Sheet: IUPAC Naming

1.4.1. Biomolecules

1.5.1. Summary Sheet: The Basics

1.Q. Checkpoint Quiz9 Qns

2. Introduction to Organic Structure and Bonding II

1.5hr

2.1.1. Bonding Models

2.1.2. Practice: Valence Bond Theory/Hybridization3 min

2.2.1. Valence Bond Theory and Hybridization7 min

2.2.2. Example: Valence Bond Theory/Hybridization5 min

2.3.1. Molecular Orbital Theory4 min

2.3.2. Aromaticity13 min

2.3.3. Summary Sheet: Naming Aromatic Rings

2.3.4. Example: Aromaticity5 min

2.3.5. Example: Aromaticity3 min

2.3.6. Practice: Aromaticity2 min

2.4.1. Bonding in Delocalized Systems3 min

2.4.2. Example: Resonance Structures6 min

2.4.3. VSEPR Theory5 min

2.4.4. Example: VSEPR2 min

2.4.5. Example: VSEPR3 min

2.4.6. Practice: VSEPR4 min

2.5.1. Polar Bonds6 min

2.5.2. Example: Polar Bonds3 min

2.5.3. Example: Polar Bonds 2 min

2.5.4. Practice: Polar Bonds 50 sec

2.5.5. Intermolecular Forces4 min

2.6.1. Physical properties of organic compounds4 min

2.6.2. Example: Intermolecular Forces3 min

2.6.3. Example: Intermolecular Forces2 min

2.6.4. Practice: Intermolecular Forces1 min

2.Q. Checkpoint Quiz15 Qns

3. Conformations and Stereochemistry

1.6hr

3.1.1. Summary Sheet: Isomers Flowchart

3.2.1. Constitutional Isomers5 min

3.2.2. Example: Constitutional Isomers4 min

3.2.3. Example: Constitutional Isomers3 min

3.2.4. Conformational Isomers6 min

3.2.5. Example: Conformational Isomers3 min

3.3.1. Chair Conformation4 min

3.3.2. Example: Chair Conformations60 sec

3.3.3. Example: Chair Conformations1 min

3.3.4. Practice: Chair Conformations2 min

3.4.1. Chiral Molecules5 min

3.4.2. Cahn-Ingold-Prelog Rules4 min

3.5.1. Assigning R and S Nomenclature4 min

3.5.2. Example: Stereochemistry7 min

3.5.3. Example: Stereochemistry 24 min

3.5.4. Practice: Stereochemistry 2 min

3.5.5. Practice: Stereochemistry1 min

3.6.1. Optical Isomers13 min

3.6.2. Example: Optical Isomers3 min

3.6.3. Example: Optical Isomers 23 min

3.6.4. Practice: Optical Isomers 1 min

3.7.1. Molecular Representations

3.7.2. Example Transforming Fisher Projection to Haworth Projection

3.8.1. Geometric or Cis/Trans Isomers6 min

3.8.2. Example: Geometric Isomers4 min

3.8.3. Practice: Geometric Isomers 2 min

3.9.1. Summary Sheet: IUPAC Naming

3.9.2. Summary Sheet: Naming Molecules with Stereochemistry

3.9.3. Example: Naming Molecules with Stereochemistry4 min

3.9.4. Example: Naming Molecules with Stereochemistry2 min

3.9.5. Practice: Naming Molecules with Stereochemistry2 min

3.10.1. Summary Sheet: Stereochemistry

3.10.2. Summary Sheet: Determining Maximum Number of Stereoisomers

3.10.3. Summary Sheet: Nomenclature and Conformations of Alkanes and Cycloalkanes

3.Q. Checkpoint Quiz10 Qns

4. Structure Determination I- UV-Vis and Infrared Spectroscopy, Mass Spectrometry

47min

4.1.1. Electromagnetic Spectrum2 min

4.1.2. Hydrogen Deficiency Index4 min

4.2.1. Mass Spectrometry9 min

4.2.2. Example: Mass Spectrometry4 min

4.2.3. Example: Mass Spectrometry2 min

4.2.4. Example: Mass Spectrometry2 min

4.3.1. Infrared Spectroscopy12 min

4.3.2. Example: IR Spectroscopy2 min

4.3.3. Example: IR Spectroscopy52 sec

4.3.4. Practice Question: IR Spectroscopy1 min

4.3.5. Practice Question: IR Spectroscopy 21 min

4.4.1. UV-vis Spectroscopy5 min

4.4.2. UV-vis Study Sheet

4.Q. Checkpoint Quiz3 Qns

5. Structure Determination II - Nuclear Magnetic Resonance Spectroscopy

1.2hr

5.1.1. NMR Theory6 min

5.1.2. Example: Intro to NMR2 min

5.1.3. Example: Intro to NMR2 min

5.2.1. 1H-NMR (Chemical Equivalence / Chemical Shift / Spin-Spin Coupling)20 min

5.2.2. Example: 1H NMR3 min

5.2.3. Example: 1H NMR6 min

5.2.4. Practice: 1H NMR 3 min

5.2.5. Practice Question: 1H NMR2 min

5.2.6. Practice Question: 1H NMR1 min

5.2.7. Practice Question4 min

5.3.1. 13C-NMR Spectroscopy8 min

5.3.2. Example: 13C NMR3 min

5.3.3. Example: 13C NMR4 min

5.3.4. Practice: 13C NMR3 min

5.3.5. Example: 13C NMR3 min

5.4.1. Structure Elucidation

5.P.1. Practice: Structure Elucidation 1

5.P.2. Practice: Structure Elucidation 2

5.P.3. Practice: Structure Elucidation 3

6. Overview of Organic Reactivity

6.1.1. An Acid-Base (proton transfer) Reaction

6.1.2. SN1 Reactions Theory

6.1.3. SN2 Reactions Theory

6.2.1. Thermodynamics

6.2.2. Catalysis

7. Acid-Base Reaction

1.1hr

7.1.1. Acid/Base Equilibrium Fundamentals - Use of Acids and Bases in Organic Chemistry4 min

7.2.1. Acid/Base Equilibrium Constants2 min

7.2.2. Key Definitions in Acids/Bases5 min

7.2.3. Example: Acid/Base Arrows 3 min

7.3.1. Factors Influencing Acid/Base Strength2 min

7.3.2. Electronegativity1 min

7.3.3. Atom Size2 min

7.3.4. Resonance3 min

7.3.5. Hybridization3 min

7.5.1. Induction3 min

7.5.2. Aromaticity3 min

7.5.3. Example: Acid/Base Strength 3 min

7.5.4. Example: Acid/Base Strength 3 min

7.5.5. Practice: Acid/Base Equilibria 2 min

7.5.6. Practice: Acid/Base Equilibria 2 min

7.5.7. Important pKas You Should Know4 min

7.5.8. Relationship Between pH and pKa2 min

7.5.9. Amino Acids at Different pHs3 min

7.5.10. Practice: Amino Acids in Solution3 min

7.5.11. Practice: Amino Acids in Solution3 min

7.5.12. Summary Sheet: Amino Acids in Solution of Various pH

7.5.13. Summary Sheet: pKa's of Common Molecules

7.6.1. Polyprotic Acids2 min

7.6.2. Polyprotic Acids - Example Problem3 min

7.7.1. The acidity of Alpha-Protons3 min

7.8.1. Summary Sheet: Chemical Equilibria and Acid/Base Chemistry

7.Q. Checkpoint Quiz15 Qns

8. Nucleophilic Substitutions Reactions

43min

8.1.1. SN1 Reactions

8.1.2. SN2 Reactions

8.1.3. General Terminology4 min

8.2.1. Nucleophiles4 min

8.3.1. Electrophiles2 min

8.4.1. Leaving Groups4 min

8.5.1. SN1 Molecularity and Rate57 sec

8.5.2. SN1 Structural Requirements1 min

8.5.3. SN1 Mechanism4 min

8.5.4. Practice: Sn1 Reaction1 min

8.5.5. SN2 Molecularity and Rate1 min

8.5.6. SN2 Structural Requirements2 min

8.5.7. SN2 Mechanism4 min

8.5.8. Practice: Sn2 Reaction1 min

8.5.9. Leaving Group Ability4 min

8.5.10. Example: Alcohol as a Leaving Group2 min

8.5.11. Solvent Effects in Substitution Reactions6 min

8.5.12. Stereochemistry in Substitution Reactions2 min

8.6.1. Summary Sheet: Substitution Reactions

8.Q. Checkpoint Quiz13 Qns

8.P.1. Practice: Substitution Question 1

8.P.2. Practice: Substitution Question 2

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Unanswered

Scarlet K

Are there any tips for identifying equivalent hydrogens in a H NMR?

Answered

Anonymous

is there anything on skeletal structures

Rex H

Instructor

Great question! 

There is a bunch of content on skeletal answers, check our our gradebooster reviews as well as our subscription content for more info! 

Hope this helps! 

Answered

David K

how many hours must one devote/wk,? assigned homework? random quizes/mini-tests?

Emma D

Instructor

Hi David - this is a good question.  I have some general advice here.  First, save yourself time in the long run and invest 10 minutes after each class to make flashcards on things like functional groups, reagents, reactions, pKas, etc.  Second, you should plan to do 2 hours of practice for each 1 hour of class (so if you have three 1 hour classes a week, that would mean that you do 6 hours of homework a week).  Finally, as test time comes closer, you want to increase this and add an additional 10 or so hours for midterm preparation and 25 hours for final exam preparation.

Be careful for organic chemistry -- it's a course you cannot cram for.  If you invest short periods of time frequently over the semester you will get more from class and studying and thus save yourself time in the long run.  Topics build on themselves so try and stay on top of things and you will be successful!

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