Valentina’s CHE 230 Archived Resources

My Session Schedule, Winter 2016

[box]Monday 3-4pm, Richardson Library 109

Friday 12:30-1:30, Richardson Library 111

Office Hour – Tuesday 1-2pm, Richardson Library 111 [/box]

How to Survive Organic Chemistry:

  1. Go to class!
  2. Read the book (even if you don’t get a chance to read it before class).
  3. Come to SI sessions.
  4. Learn to love the practice problems at the end of each chapter.
  5. Make friends and share notes.

Preparedness for Exam I Self Check

Ask yourself, do you feel comfortable doing the following?

✓ Calculating the formal charge of an atom
✓ Interconverting between molecular formulas and Lewis, condensed and skeletal structures
✓Identifying and drawing resonance structures & corresponding resonance hybrids
✓Differentiating between constitutional isomers and resonance structures
✓Determining the hybridization of an atom
✓Committing specific pKas to memory [The ones you need to know are black in the “pKa values for common functional groups” handout]
✓Identifying trends in acidity, comparing acidity of molecules based on the 4 trends discussed
✓Solving acid/base reactions & determining the direction favored at equilibrium
✓Predicating products for nucleophilic addition/substitution reactions
✓Identifying functional groups and their properties
✓Comparing relative melting points & boiling points for molecules based on IMFs

Preparedness for Exam II Self Check

Are you able to do the following?

✓ Draw Newman Projections
✓Produce Energy coordinate diagram reflecting stability of Newman Projections
✓ Draw cyclohexane chair conformations, inter-convert between chair conformations (& identify what makes particular chair conformations more stable than others)
✓ Name alkane molecules
✓Locate chiral centers within a molecule
✓ Identify R or S stereochemistry for chiral centers
✓ Determine the relationship between similar molecules, particularly stereoisomers (enantiomers, diastereomers, constitutional isomers or same molecule)
✓Characterize reactions (as addition, substitution, acid-base or elimination)
✓Construct energy diagram for an organic reaction, one or two step reactions

Tips to Organic Chemistry Exam Success:

1.) Number your carbons when drawing structures. I’ll say it again, number your carbons!
2.) Check to make sure that any (+) or (-) charges make sense, calculate the formal charge to be sure
3.) Make sure that every H is only making 1 bond, every N is making 3 bonds , every O is making two bonds, and every C is making 4 bonds (unless there is a charge for N,O, or C [H will NEVER make 2 bonds, C will NEVER make 5 bonds])

And finally,


Study Tools

Supplemental Worksheet 1

This worksheet includes practice drawing resonance structures, skeletal structures and acid/base reactions.

Download (PDF, 345KB)

Here is the answer key,

Download (PDF, 897KB)

Supplemental Worksheet 2

Topics addressed include: naming alkanes, drawing chair conformations, assigning stereochemisty and identifying stereoisomers.

Download (PDF, 147KB)

Substitution Reaction Practice

Download (PDF, 196KB)

Download (PDF, 120KB)

Substitution & Elimination Reaction PRACTICE!

Download (PDF, 25KB)

Answer key is included in the last pages of the PDF.


Download (PDF, 267KB)

Download (PDF, 459KB)

Rhinoceros the Resonance Hybrid



Chemistry & Cats

Check out On Cats, Part 1: Conformations and Configurations

On Cats, Part 1: Conformations and Configurations

constitutional isocats

In class, we discussed constitutional isomers as molecules having the same electronic content and molecular formula. They differ only in the arrangement of atoms. This picture shows cats that have identical constituents, but these constituents are combined in a different way.

For more organic chemistry explained by cats, follow these links:

On Cats, Part 2: Cat Line Diagrams

On Cats, Part 2: Cat Line Diagrams

On Cats, Part 6: Stereocenters

On Cats, Part 6: Stereocenters