Organic Chemistry Lecture I Review
Home > Preview
The flashcards below were created by user
on FreezingBlue Flashcards.
What is a Conformational Isomer?
Conformational: Different spacial orientation i.e. Hexane. Newman Projections
Energetics of Conformational Isomers Lowest to Highest.
Anti-Staggered -- Gauche--Eclipsed--Fully Eclipsed
What is a Structural Isomer?
Structural: Different Bond-Bond connectivity. i.e. vic vs. gem-dihalide
What is difference between Relative and Absolute Configuration?
Relative: R or S Determination between 2 Chiral Carbons Absolute: R or S Determination of one Chiral Center in Single Compound.
What is an Inversion of Relative Configuration?
- Change in configuration about the Chiral Carbon when comparing to molecules. ie. R-->S or S-->R
- Product of SN2 Reaction
What is an Enantiomer?
Comparison of "Mirror Image" compounds that have the same chemical properties.
What is a Raceimic Mixture?
- Mixture in which both "Mirror Image" components are present. No optical rotation present.
- Product of an SN1 Reaction
What is a Diastereomer?
Trash Can Category. Isomers that are not mirror images. Optically active!
What is the difference between cis/trans determinant and Z/E determinant? What Isomerism do these describ?
Describes 2 substituents about a double bond found opposite and at same side respectively.
- Z/E: Determines the location of 3-4 substituents about a double bond with priority by molecular weight.
What is an Epimer?
Epimer: Diastereomeric comparison that has a difference about 1 chiral carbon. i.e. α β "anomers" of Glucopyranosyl
What explains the higher boiling point of a cis isomer to a trans isomer?
- Dipole moment: of a cis isomer allows for attractive intermolecular forces. The Net dipole moment is in the same direction as the substituents.
What would you like to do?
Home > Flashcards > Print Preview