Organic Chemistry Functional Groups and pKa Values

Vocabulary flashcards defining functional groups and their corresponding pKa values based on lecture notes.

Alkyl halide ($R-X$)

A functional group with formula $R-X$ associated with acid $H-X$ having a $pK_a$ of $-7$.

Alkane

A saturated hydrocarbon functional group ($R_3C-CR_3$) with a $pK_a$ value of $44$.

Alkyne

A hydrocarbon functional group featuring a carbon-carbon triple bond ($RC \equiv CR$) with a $pK_a$ value of $25$.

Alcohol

An organic functional group containing a hydroxyl group ($R-OH$) with a $pK_a$ range of $16-18$.

Thiol

A sulfur-containing functional group ($R-SH$) with a listed acid $pK_a$ value of $7$.

Aromatic Phenol ($OH$)

A benzene ring attached to a hydroxyl group with a $pK_a$ value of $9.9$.

Protonated Aromatic Amine ($NH_3^+$)

An aromatic amine in its protonated conjugate acid form with a $pK_a$ value of $4.6$.

Carboxylic Acid

An organic functional group ($R-COOH$) with a $pK_a$ value of $5$.

Ester

A functional group with a carbonyl bonded to an alkoxy group, having a listed $pK_a$ value of $25$.

Amine

A functional group with a $pK_a$ of $38$ for neutral $R-NH_2$ and a $pK_a$ of $9.3$ for protonated $R-NH_3^+$.

Extra Acids ($pK_a$ Values)

Additional acid structures listed with $pK_a$ values of $-9$, $15$, $9$, and $6$.