UNC-Chapel Hill CHEM 261 - Forces and Nomenclature (2 pages)

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Forces and Nomenclature



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Forces and Nomenclature

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The effect of Intermolecular forces and how to name hydrocarbons and alkanes


Lecture number:
9
Pages:
2
Type:
Lecture Note
School:
University of North Carolina at Chapel Hill
Course:
Chem 261 - INTRO ORG CHEM I Lecture 3
INTRO ORG CHEM I Lecture 3 Documents

Unformatted text preview:

Chem 261 1nd Edition Lecture 9 Outline of Last Lecture II Inductive Effects III Lewis Acids and Bases IV Drawing Skeletal Structures Outline of Current Lecture V Interactions VI Nomenclature Current Lecture Interactions between molecules influence their bulk properties o These interactions are known as London Dispersion forces Dipole Dipole forces and Hydrogen bonding o Alkanes only have LD forces o The greater the surface area of the molecule the greater the LD forces and therefore higher boiling point Branching lowers the boiling point because there is a smaller surface area Dipole Dipole must have polar covalent bonds Hydrogen bonds are stronger than other dipole dipole interactions Electronegativities also play a part ethanol has a higher boiling point than ethylamine does because oxygen is more electronegative than nitrogen Nomenclature o Cyclic compounds Add prefix cyclo name substituents give the lowest number to the highest priority functional group These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute



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