Class Notes (834,735)
Canada (508,704)
Chemistry (543)
CHEM 2OA3 (54)
Lecture

07-10 - Rotamers, Radical Halogenation, Hyperconjugation, Classes of Alkane Reactions, Cracking, Cycloalkanes.docx

3 Pages
152 Views
Unlock Document

Department
Chemistry
Course
CHEM 2OA3
Professor
Jeff Landry
Semester
Winter

Description
Drawing Rotamers  If there’s a specific form he’s looking for, he has to specify more details about it, or else you can draw any potential rotamer and it would be correct  Barrier energy is the sum from the lowest point to the highest point Radical Halogenation and Bond Strength  Homolytic Cleavage: A:B → A’ + ‘B (radicals) + -  Heterolytic Cleavage: A:B → A + :B  Use electronegativity to compare acidity! o O-H bond is MUCH stronger than a C-H bond, but H O is mor2 acidic than CH 4 because oxygen is more electronegative than carbon  CH 4ond strength > Primary > Secondary > Tertiary  More stable products when you cleave bond → weaker bond o Product energy level changes ALSO change the energy barrier to make the break of the bond  Hyperconjugation: p-orbital (with a single electron) overlaps with bonding molecular orbital of neighboring C-H (or any other) bond o Should be able to show a 3D drawing of it if asked o More hyperconjugation → more stability Free Radical Halogenation  H-CH +3X-X → H C-H 3 H-X o Need energy (light or heat) to trigger this cleaving of X-X bond o Need to cleave the X-X bond homolytically o Almost all radicals are extremely reactive o Want one of the X’s to extract one of the hydrogen atoms from the CH (whic4 means than the C-H bond cleavage is ALSO homolytic) o THEN, the NOW RADICAL ‘CH pulls an 3 from one of the other normal X-X  Br:Br → Br’ + ‘Br (INITIATION)  Br’ + CH 4 H-Br + ‘CH (PR3PAGATION)
More Less

Related notes for CHEM 2OA3

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit