Aqa chem4 15th june 2011 (resit) thread

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Reply 980

FristyKino

Original post by artykid23

Ionly remember doublet and quartet :tongue:

For the first one ii wrote 4 splits.
a was a triplet.

The second one was 5 spliting peaks.
singlet.

:confused:

Reply 981

lou12

Original post by FristyKino

For the first one ii wrote 4 splits.
a was a triplet.

The second one was 5 spliting peaks.
singlet.

:confused:

oops, did the questions say explain the splitting pattern or did it just ask for the splitting pattern?

Reply 982

king101

Original post by lou12

oops, did the questions say explain the splitting pattern or did it just ask for the splitting pattern?

It was just asked, not explain

Reply 983

FristyKino

Original post by lou12

oops, did the questions say explain the splitting pattern or did it just ask for the splitting pattern?

They asked for how many peaks would there be in the Hnmr.
And they asked the splitting pattern for 'a' on the first compound and 'b' on the second compound.

Reply 984

lou12

Original post by FristyKino

They asked for how many peaks would there be in the Hnmr.
And they asked the splitting pattern for 'a' on the first compound and 'b' on the second compound.

aah cool thanks :smile:

Reply 985

househouse

can someone tell me the structures of the compounds which we had to name, give number of peaks and splitting pattern of labelled protons. if ur not sure dnt guess. :smile:

Reply 986

Calimboness

I was just happy that buffers didn't come up, like the one from june 10 :smile:

Sad that I crammed the enantiomer and racemic definitions and they didn't come up though... :frown:

Reply 987

Turnerthecentury

1) 3,3-dimethylbutan-1-ol
4 peaks
triplet

2) 1,1-dimethylbutan-1-ol
4 peaks
singlet

Reply 988

Casshern1456

Original post by JK471993

I know the exam was pretty hard but at least they didn't have any questions where they give you the moelcular formula and throw loads of analytical information at you and then you have to guess what the molecule is!

I love those :tongue:

Reply 989

bjparmar

Omggggggggg i thought the exam went ok until i looked on this thread !

Reply 990

lou12

Original post by Turnerthecentury

1) 3,3-dimethylbutan-1-ol
4 peaks
triplet

2) 1,1-dimethylbutan-1-ol
4 peaks
singlet

i got a butan-2 -ol for one of them

Reply 991

Turnerthecentury

You may be right :tongue:

i cant remember the molecule or i would have another look.

Reply 992

Mikkels88

yeh wasnt it like 2,4-dimethylbutan-2-ol or something?

exam was alright overall, quite... different, like they had some sneaky **** - the question on cyclohexene at the end was CLEARLY meant to trick you into thinking about using the aromatic routes ie Sn/HCL etc, luckily i realised in the last few minutes :smile:

and that ecology BS about making the public more confident... what is this a biology paper?

Reply 993

Manni12

Anyone got the paper/Mark scheme??

Reply 994

bluefrog

Original post by Turnerthecentury

1) 3,3-dimethylbutan-1-ol
4 peaks
triplet

2) 1,1-dimethylbutan-1-ol
4 peaks
singlet

you can't have 1,1-dimethylbutan-1-ol, it'd have to be 2-methylpentan-1-ol

Reply 995

Master.K

You know for those big 3 marker questions .....where you had name reagents....etc.
One of them showed an aldehyde.....Is it ok if I put tollens' reagent and silver mirror is formed? :confused:

Reply 996

bluefrog

Original post by Casshern1456

I did but ppl on here saying it's a hexane and AQA tried to trick us. I'm worried. :s-smilie:

i'm not entirely sure about nitrohexane, i think it said singular reagent though? and no2+ is generated from h2so4 and hno3 both conc?

i do however know that it can't be hexane as there is no way of generating the end product from hexane in a single step.