Lecture5 - CHEMISTRY
30B
 ORGANIC
CHEMISTRY
...

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Unformatted text preview: CHEMISTRY
30B
 ORGANIC
CHEMISTRY
 Lecture
5
 No#ces
and
ques#ons….
 “Where
in
the
world
is
Professor
Garcia‐Garibay?”
 LAST
MONDAY
 A
Week
ago

 FRIDAY,
 and
flew
out
at
2am
today

 THURSDAY
 WEDNESDAY
 and
 FRIDAY
 TUESDAY
 MORE
NMR
 SO
FAR
 •  WHAT
NUCLEAR
SPIN
IS,
HOW
A
NMR
 MACHINE
DETECTS
RESONANCES
 •  SAMPLE
AND
THE
EXPERIMENT
 •  BASIC
FEATURES
OF
PROTON
SPECTRA
 –  Chemical
ShiF

(δ,
ppm)
 –  upfield
and
downfield
 –  integra#on
of
peaks
 –  equivalent
protons
 Chemical
shiFs
of
protons
in
various
environments
 CHEM 30C, COMMON 1H NMR CHEMICAL SHIFT RANGES Common NMR solvents: CDCl3, D3C–SO–CD3, D2O CD3OD O-CH-O, O-CH-X X-CH-X, Ar-CH-O, etc RCOOH (13-20 ppm) X-CH (F, Cl, Br, I) alkene =CH trans: 14-18 Hz cis: 8-10 Hz gem: 1-3 Hz C!CH N-CH aryl =CH O O 9 8 CH CH2 CH3 sp3 R-OH, usually broad singlet NH (amine, also broad singlet) amide CO-NH and Ar-OH 10 H O-CH H 7 6 (ppm) 5 4 3 2 CHEM 30B, COMMON 13C NMR CHEMICAL SHIFT RANGES –C!N N-C TMS (Me4Si) 1 0 The
plot
thickens:
 CH3CHCl2
 Spin‐spin
spliVng
 Spin‐spin
spliVng
 Spin‐spin
spliVng
 Common
spliVng
paWerns
 Common
spliVng
paWerns
 Common
spliVng
paWerns
 Common
spliVng
paWerns
 WEDNESDAY
 Dr.
Miguel
Garcia‐Garibay,
your
regular
30B
Professor,

 will
be
here.

 Learn
Organic
Chemistry
 




















































and
have
a
great
life!
 ...
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