OCR F324-June 2013 Chemistry

Okay, it's a cyclic hydrocarbon with 6 carbon and hydrogen atoms arranged in a planar hexagonal ring and they are bonded to two other carbon atoms and there is ring of electron density above and below the hexagonal ring because of the overlap of the pi bonds which creates a delocalised ring of electrons.


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Good, 3/4, mention 120 around each carbon atom
my turn

Oh okay, thanks. Explain the products made an ester is hydrolysed with an acid and also the products of alkaline hydrolysis for the ester butyl propanoate. (3)


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products of acid

CH3CH2COOH + HO-CH2-CH2-CH2-CH3

products of alkaline with aq NaOH

CH3CH2COO-Na+ + Na+O- - CH2-CH2-CH2-CH3

That's all correct except for your alkaline hydrolysis as it still produces the alcohol again with the sodium salt of the carboxylic acid. Good try though


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why is it the COOH reacts but not the alcohol, do you know?

I'm not really too sure why, I just remember that's what happens when doing the questions


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ok thanks

Give 2 properties of Phenol and why is phenol slightly soluble in water (3)

It's a solid at RTP and undergoes electrophilic substitution like benzene but doesn't require a halogen carrier. It is slightly soluble in water because the OH group forms hydrogen bonds with water.


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will lose a mark, should say pink solid!

but good!

my turn

I see, my bad.

Okay, if you wanted get from an alkene to a primary alcohol then what reagents and conditions are required? (2)


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no worries!


is it aq NaBH4 and heat is applied

Nope, it's steam, 300 degrees and a phosphoric acid catalyst, this was just testing what you could remember from last year


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oh no thats wrong it should be 150 with a Ni catalyst

oh yes, better recap on F322!!

Define:chrial

It's fine as I doubt they'll ask us something to do with that. And chiral is a molecule that has 4 different groups attached to it (normally a carbon centre) that creates a non super imposable mirror image of each other.


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yes correct, but in case !

That's true.

Explain spin spin coupling in proton NMR. (4)


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On the examiner tip, we will not be assessed on this, only when we need to interpret from the spectrum we should know about the triplet and quartet

I can't see the one that says that :-/


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