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

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

3 Pages
Unlock Document

Jeff Landry

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


Join OneClass

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

Sign up

Join to view


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.