Class notes

HNMR Spectroscopy - Organic Chemistry

5 views 0 purchase

Course
CHEM 281 (CHEM281)

Institution
Simon Fraser University (SFU )

Condensed class notes from lectures about nuclear magnetic resonance (NMR). Includes mechanics and theory, identification, and degree of unsaturation.

[Show more]

Preview 1 out of 1 pages

View example

Uploaded on January 18, 2024
Number of pages 1
Written in 2023/2024
Type Class notes
Professor(s) David vocadlo
Contains Class 15

CA$4.42

Add to cart

Add to wishlist

100% satisfaction guarantee
Immediately available after payment
Both online and in PDF
No strings attached

-
MAGNETIC
NUCLEAR Resonance
Spectroscopy

·
I
WHA WE

VOCLEAR
KNOW ABOU ACONS

magneTre
Resource
HAS ALLOWED

Spectroscopy
FOR

BREAKTHROUGHS
is ONE of THESE
NO TEC

BREAKT
torogy
trag togof
for THE
Is - 7I
STRUCTURAL

Histo As I
DETERMINATION of

ing
HREsoltron
MOTECOLES

As Some OTHER
-

provide Molecule's compason/structure
I
it Does Idea
good
CHEMISTS Wi A a
like
rapity
Echting
X-ray .

cryserilog
Ves ,

·
THE BASIS upon WHICH NMR WORKS :

! we know tha

in Some CASES , THIS
el Mdei Have A
POSTNE
CHARGE BERg
,

THE CLEAR Arts
Composed of praxis And ver rous

3 GLRGED
VOLEi ARE
POSTNE

Change
a

CREATING MagneTr
postNE Spms On ,

o
D
m

of Aband

frgERS Rig fry
WHEN THE THE are CURLED So Tha The PONT THE SAME

man
mExre Moment . ERS N

Droectron as the Spiro The Thur wil Medicate The DrrECTron of The

miguetr
.

SPir (l)

HALf INTEGER ODD

INTEGER Even odd
NMR MEASURES FREE INDUCTION decry !
ZERO EVEN EVEN

B Sprin -z =

NOTE : Adjacen
M
hydrogen
BONdEd
E AE
AOMS ARE TO
AdjACENT AOMs
WCLEi ARE CLASSIFIED By Domic MASS And Acom Number .
NoelEi WITH And ARE THREE BONdS
Andy
from EACH OTHER
Ye Have
perfectly Spierreal Spr +
&
THE NUMBEROf
a
=
I =
ALLOWED STATES

charge
.
Spr .

Ja ExtEr ne Feld
AlgorsELY
Heelers
migrette
↳S ZI + 1 Mo

grew By
.
,
an ar 2

Bo

Wr The field parallel or .
B
Against
Or
or
, antiparallel ,
a

THE AE Between d and B States is Sma However AE

get larger
.
, we Can a

By Frid Than

usmaestranger Magnete
There dre
slightily
. more recei in & State state sorce

& STATE OS THE LOWER
Energy
-

of
Frequency Equal
WHEN Em Radiation a AE 1 CHEMICAL Shift WHERE THE RESONANCE Is On THE Os
REPORTE
The
w llEi are Exposed To To
,
some SPECTRUM .

from for A of presson
of the reclEi Are ExcrEd L To B STATE THES .
Spi-ferp Frequency is CALLED The in
part per Mulron (PPM) and MES CONSTAN

grew "Type"
.

Resource
Frequency
. As THE NUCLEi RELAT Back To

ground
STATE,
THEY EMP Ar NMR
SIGNAL
. THE THIS CAN ALSO BE AffECTED
By
:

decay Surround

SHIELDMY/DESHIELDMG
Process free induction 2 WHEN ELECTROms THE melEus also

g
Called
is .
. is

carcated produce a Smart field oppoSME THE AppliED frELd THE ELECTRONS
magnetr
TO .

H-NMR SPECTRA
Analyzing
SITELd THE from feld WHEN
Extremely
magnetic
NoclEns The Exterior .

ACOMS ARE NEARBY THEY CAN CAUSE THE ELECTRON JENSMY SHI
ELECTRONEGAINE
, TO

Compound "H
REFERENCE is TMS SiCH3 + Effectrely deShielding The redEus .

Field Electrons of Aromate

Ring
Un A
magnetic
CORNE As A

3
Rig
,
averEns

He
Go
field And Causes a
desHiElding
Si THIS CREMES Effe
Magnetic
MS O u r

idental
from Alkenes
Moy/dESHiElding
SHIELD Effects &
:
THE
Carbony

O DEPEND On THE ORIENTATION

C C
of THE
Hydrogen .
THIS Is CALLED

AlkynE
m ua
c n
n n a m
e
s o m
n oe o
enn e
Amastropy
Magnetic
- -
zu - - - - - -

-

ALKENE
3 MOLECCAR
SHIELdEd CONNECTIMY
Coupling
DESHiEldEd - MORE .
Spro-Spi occurs

doe frelds of -
magnetic Merry mechei
weak
Spirss
to . M
dOESN TELL
WHAT us :

of
AdjACENTHy
drog
THES MA Ens TO SEVERAL SMALLER PEARS THE DISTANCE BETWEEN THESE SMALLER PEAks
FEATURE of SPECTRUM
g
o
.

info ABOUT Molecule
Carbonyl

(J)
He IS THE
COUPLING
CONSTANT WHA DECREASES AS BONDS
SEPARATING
THE ACOMS INCREASES .

of
Mary Types of proons
unsaturation
Number -
How

Signals
·

3
Each

cupine OFCISATURATION : rig
of PEAk of Eselt or DECREASES
Hydrogenes
How
Inegrerow Mary
·

DEGREE
Type

SHAPE of NMR PEAR #ABY2
NeigArsoveming proxons
·

DoV 20 + 2 + N H
-Shielding/deshrelding
·
Chemiere SHifT = -
X -

⑮ ~

# of
Horogens

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller kac26. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for CA$4.42. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

52928 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling