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Constitutional isomers of C2H4O2 | Carboxylic acid & Ester – Dr K


Question is asking us to draw out all
possible carboxylic acid and ester isomers for C2H4O2. Carboxylic acid
has a carboxyl group which is COOH whereas ester has a carbonyl group
attached to O and C like this. C double bond O, OC. The difference
between carboxylic acid and ester is carboxylic acid has a H connected to
an O, whereas ester has a C connected to an O. Let’s start with carboxylic acid. Since
we only have two carbons, so, we’ll place them next to each other and then we’ll
add in the carboxyl group and then we’ll fill in the remaining bonds on carbon
with hydrogens. So, each carbon will make four bonds so the carbon on the left is
already connected to one carbon so that means it will connect to three
hydrogen’s like this and it looks like we’ve completed our first isomer. There’s
no other way we can draw carboxylic acids with two carbons, so, let’s move on
to ester. Wster contains a C double bond O, OC functional group.
Now that we’ve used up two carbons and two oxygen, we’ll fill in the rest of the
bonds on carbon with hydrogens like this. Since there is no other way to draw ester
with two carbons that means we’re done drawing out all carboxylic acid and
ester isomers for C2H4O2. If you’re interested in drawing other isomers for
C2H4O, to let me know in the comments and I’ll post a video for it. I hope you find the video helpful. Do subscribe and thanks for watching!

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