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Organic chemistry question

Idk what's going on in this
chem.PNG.
(edited 1 year ago)
Original post by Dell PC 2
Idk what's going on in this
chem.PNG.


what exam board is this
Reply 2
Original post by danhas20
what exam board is this


ccea for as chemistry
it was in their 2019 paper as2
Original post by Dell PC 2
ccea for as chemistry
it was in their 2019 paper as2

no idea sorry man, i do ocr
Original post by danhas20
what exam board is this

If you remove the bromine atom (and, of course, one hydrogen), there are three possible positions in which a C=C bond could form:

-Between the central carbon in the CH(CH3)2 group and the carbon in the C-Br.

-Between the carbon in the CH3 and the carbon in the C-Br.

-Between the carbon in the CH2 and the C-Br.

Try drawing the structures of each of these three possible alkenes. Any where there are 2 different groups on each carbon in the C=C bond will form a pair of E/Z isomers.

Edit: oops responded to the wrong post, meant to quote the original. Wow I’m tired lol.
(edited 1 year ago)
Original post by danhas20
no idea sorry man, i do ocr

Just a heads up, this type of question does assess content that comes up in the specifications for all the major UK exam boards- including OCR A and B. You may be asked something similar in your actual exams.
Reply 6
Original post by TypicalNerd
If you remove the bromine atom (and, of course, one hydrogen), there are three possible positions in which a C=C bond could form:

-Between the central carbon in the CH(CH3)2 group and the carbon in the C-Br.

-Between the carbon in the CH3 and the carbon in the C-Br.

-Between the carbon in the CH2 and the C-Br.

Try drawing the structures of each of these three possible alkenes. Any where there are 2 different groups on each carbon in the C=C bond will form a pair of E/Z isomers.

Edit: oops responded to the wrong post, meant to quote the original. Wow I’m tired lol.


IMG_20230520_170127.jpg
Is this what the molecules are supposed to look like?
Also, how am I supposed to get the correct answer in under a minute?
Original post by Dell PC 2
IMG_20230520_170127.jpg
Is this what the molecules are supposed to look like?
Also, how am I supposed to get the correct answer in under a minute?

If the bromoalkane you copied down was correct, you would have drawn the correct alkenes- but you missed one carbon on the molecule and that does affect the answer.

Yeah, you need longer than a minute to answer that question imo.

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