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OCR A-level Chemistry A Paper 2 - 16th June 2025 [Exam Chat]

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Reply 180

user3837383737

Anyone get an ester on the last question

Reply 181

mhumphries

(CH3)3-CH2-COOCH2CH2 I think I got this for the last question

Reply 182

steerabbie

Original post

by am4lia_44

anyone get an ester for NMR?

yes!

Reply 183

Fesdces1

Original post

by mhumphries

(CH3)3-CH2-COOCH2CH2 I think I got this for the last question

I got (CH3)2 - CH - O - C=O - CH2 - CH3 I’m pressure sure

Reply 184

mhumphries

Original post

by mhumphries

(CH3)3-CH2-COOCH2CH2 I think I got this for the last question

CH3 typo at the end

Reply 185

Leosiek

Original post

by hehehe_19

What dod everyone get fr the last one sid anyone get like a benzene???

If you got a molecular formula of c6h12o2 it cannot be benzene

Reply 186

Leosiek

Original post

by mhumphries

CH3 typo at the end

I got this

Reply 187

1Thinking

Original post

by Blehblah17171

Nope it was an Ester with like 4 carbons on the alcohol aide and other 2 on the cabroxylic acid side

I agree

Reply 188

steerabbie

Original post

by Fesdces1

I got (CH3)2 - CH - O - C=O - CH2 - CH3 I’m pressure sure

I got that

Reply 189

elenamar

Original post

by Fesdces1

I don’t agree with the in ethanol part for potassium hydroxide also sodium hydroxide works

yeah i swear it’s just NaOH

Reply 190

spectus_

Original post

by Fesdces1

I don’t agree with the in ethanol part for potassium hydroxide also sodium hydroxide works

agreed, pretty sure it’s NaOH(aq)

Reply 191

Winson123

Chemsitruy whent so well

it was so easy im getting 100

Reply 192

Blehblah17171

What was the NaBH4 thing for reducing the organic compound

Reply 193

incognito11

Original post

by Fesdces1

I got (CH3)2 - CH - O - C=O - CH2 - CH3 I’m pressure sure

me too! isopropyl propanoate?

Reply 194

mhumphries

Original post

by Fesdces1

I got (CH3)2 - CH - O - C=O - CH2 - CH3 I’m pressure sure

Yep looks right. Felt like I was missing a CH somewhere

Reply 195

judojay06

Original post

by Blehblah17171

What was the NaBH4 thing for reducing the organic compound

the mechanism was just the c=o breakin with H- joining C then H+ joining O- in intermediate stage

Reply 196

fergus.lk

methylethylpropanoate anyone? 9.53g for the yield

Reply 197

dhsmxkk

ch3ch2cooch(ch3)2?

Reply 198

Blehblah17171

Original post

by incognito11

me too! isopropyl propanoate?

Did we have to name it?

Reply 199

Winson123

guys did you get an aromatic compound for NMR??

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