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alkene

alkyne

benzene ring
(H's replaced by R's)

alkyl halide
(R is a C)

alcohol
(R is a C)

phenol
(each of the 5 other C's can be connected to something else)

ether
(R's = C's)

thiol
(R = C)

sulfide
(R's = C's)

disulfide

amine
(1 of R's = H or C)

ketone
(R's = C's)

aldehyde
(R = C or H)

carboxyl
carboxylic acid, RCOOH
(R = C or H)

ester
RCOOR
(R near C=O is H or C, R near O-C is C)

amide
(R near C=O is H or C)

acid chloride
(R = C or H)

acid anhydride
(R's = C's or H's)

imine

nitrile
nitro

hemiacetal
functional group containing an ether group & a hydroxyl group bonded to the same carbon atom
(When H and the R next to the H are carbon groups this functional group is sometimes called hemiketal [outdated])
![<p>functional group containing an ether group & a hydroxyl group bonded to the same carbon atom</p><p>(When H and the R next to the H are carbon groups this functional group is sometimes called hemiketal [outdated])</p>](https://assets.knowt.com/user-attachments/98e8569e-26e8-4519-8edc-c91598b7ccbc.png)