Class Notes (806,766)
Canada (492,430)
Chemistry (588)
CHM136H1 (147)
don'tknow (2)

Ch17 Section 2.pdf

1 Page
Unlock Document

University of Toronto St. George

Alcohols and phenols Alcohols and phenols have nearly the same geometry around the oxygen atom as water R-O-H bond angle has an approximately tetrahedral value and the oxygen is sp3-hybriedized Higher boiling points Can hydrogen bonding A positively polarized –OH atom is attracted to a lone pair of electron on the EN oxygen of another molecule Intermolecular attraction must be overcome for a molecule to break free from the liquid and enter vapor state Boiling temperature is raised oxonium ions H3O+ Weakly basic: reversibly protonated by strong acids to yield oxonium ions, ROH2+ Weakly acids: dissociate slightly in dilute aqueous solution by donating a proton to water, making H3O+ and an alkoxide ion RO-, or a phenoxide ion, ArO- Smaller Ka and larger pKa are less acidic Larger Ka and smaller pKa are more acidic Substituent groups have a significant effect Phenols and thiols, the sulfur analogs of alcohols are substantially more acidic than water alky substitution on alcohol acidity is due to Solvation of the alkoxide ion formed on acid dissociation the more readily the alkoxide ion is solvated by water the more stable, the more its formation is energetically favored, and the greater the acidity of the parent alcohol. Inductive effects are also important in d
More Less

Related notes for CHM136H1

Log In


Don't have an account?

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.