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OCRa A level Chemistry Module 6 Spectroscopy Notes $8.33
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OCRa A level Chemistry Module 6 Spectroscopy Notes
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  • Course
  • Module 6 Spectroscopy
  • Institution
  • OCR

Following the specification, I crafted these notes during my A level course. Beginning with the science behind NMR, these notes will help you go that extra mile during your studies. Using them myself helped me go from a C in year 12 to an A at the end of year 13, and they'll help you accomplish tha...

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Document information

  • June 18, 2024
  • 5
  • 2023/2024
  • Class notes
  • Mr mirtschin
  • All classes

Subjects

  • ocr a
  • a level chemistry
  • module 6
  • module 6
  • ocr
  • a level
  • spectroscopy
  • nmr
  • proton nmr
  • carbon nmr
  • chemical shift
  • splitting pattern
  • n 1
  • exam practice
  • n1

Written for

  • A/AS Level
  • OCR
  • Chemistry A
  • Module 6 Spectroscopy
All documents for this subject (1)

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saimahkalam

Content preview

10 18 23
.
.




Spectroscopy 6 3
. .
2




NMR :
used in hospitals for MRI's (Magnetic Resonance Imaging


NMR spectroscopy involves interaction of materials with low-energy
radis waves of the electromagnetic spectrum
.

All nuclei possess charge + mass

ONLY those with odd numbers are able to spin
.




TMs etramethysilane (CHs)ySi is added to provide standard
=
a

reference signal.

used as the standard :

-




-
inert
volatile
c
non-toxic
is
-




chemical shift value of 0
.


solutions containing both carbon and hydrogen atoms must be
-




deuterated to ensure it is not picked up and no signal is shown on

the NMP spectrum
.




e .

.
g Deuterated Chloroform (CDCIs) isotopologue
: of Chloroform /CH(s)
A atom is replaced by deuterium isotope (D).
commonly used solvent when running carbon-13 +
proton
NMR spectroscopy
.

, 16 10 23
- .




Carbon-13 NMR



Carbon-13 NMR chemicalshift indicates the number of different
carbon environments (atoms) +
type of environment.



You can't have more peaks than numbers to catons,
-



You CAN have 11 peak ) then number of safm/.
-




18 18 23
. .




Poston NMR


Proton NMR chemical shifts indicate the

chemical environments of the protons present


e ethanol peaks
-

.


g three
It It
I ↑ at 1 3 5 and 6 alppm
- .



, ,


H


-
-
-
peaks on the proton NMR

i
spectrum :




(2H) (1H) (3H)
absorption




121110987654321


chemical sit 1 flppm

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