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Organic Chemistry Study Guide Exam II

by: Sarah Glover

Organic Chemistry Study Guide Exam II Chem 301 001

Marketplace > University of New Mexico > Organic Chemistry > Chem 301 001 > Organic Chemistry Study Guide Exam II
Sarah Glover
GPA 3.8

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About this Document

These notes go over in order the key information needed to solve the practice exam. This information will appear on the next exam.
Organic Chemistry 1
Dr. Richard Holder
Study Guide
Organic Chemistry, unm, Chemistry, Science
50 ?




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This 2 page Study Guide was uploaded by Sarah Glover on Tuesday February 23, 2016. The Study Guide belongs to Chem 301 001 at University of New Mexico taught by Dr. Richard Holder in Spring 2016. Since its upload, it has received 68 views. For similar materials see Organic Chemistry 1 in Organic Chemistry at University of New Mexico.


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Date Created: 02/23/16
Organic Chemistry Study Guide Exam 2 I will list the information needed to know in the order it appears on the practice exam provided by Dr. Holder.  Functional Groups- be able to identify them in larger molecules.  Determining Chirality Centers- There must be four different things attached to a carbon. Or in a ring structure the carbon must be attached to four different paths. (Don’t forget that hydrogens are rarely drawn but still are taken into account.) (Double bonds rule out the possibility of a chiral center).  Number of Stereoisomers- it is 2 and n= the number of chirality centers. However, if you determine that one of the configurations is meso then you subtract one from the number oststereoisomers.  Determining Meso Isomers- 1 draw the mirror image of the structure. Or construct two models that are mirror images of each other. Then, turn one of the models or the drawing 180 degrees. If they are superimposable then the compound is meso. It will also have a plane of symmetry in it.  Determining Cis or Trans- if two substituents are on the same side they are cis if they are one different sides they are trans.  Determining right handed and left handed (R&S) stereoisomers- Step one- number all substituents in order of increasing atomic number. If two of the substitutes are carbon then determine it by what the carbon is attached too. th Step two- switch the 4 numbered substituent with another substituent so that it is going into the plane (three dashes or at the top of a Fischer projection). Then switch the other two. Step three- count according the number looking in from the four position. If it goes clockwise it is R if it goes counter clockwise it is S. Observedrotation  Determining rotation- Concentration xLength∈dm If two enantiomers are in the same mixture in equal concentrations their opposite spins will cancel each other out. If they are in unequal concentrations then subtract the two percentages from each other to find the enantiomeric excess (ee). To find how pure your mixture of one desired enantiomer obeserved rotation rotationof pureenatiomer If for example you find your mixture is 70% pure that means that 30% is your undesired enantiomer.  Nomenclature (Naming Chains) Determine longest parent chain with the most substituents. Number the chain putting substituents with lowest number possible. Name and alphabetize substituents. (Naming bicyclic) count all the carbon bridgeheads (overlapped carbons only count once). Count in between bridge heads. Give substituents lowest number possible.


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