Lecture 2

Question 1

for a nucleus in a mag field, the nuclear spin can be aligned?

Answer 1

with or against the mag field (Bo)

Question 2

protons have how many spin states

Answer 2

2 (-1/2 and +1/2)

Question 3

Nuclear spin with mag opposing

Answer 3

higher in energy (unstable)

Question 4

nuclear spin aligned with is

Answer 4

lower in energy (stable)

Question 5

-1/2 and 1/2 have what type of energy

Answer 5

equal energy so they have no energy difference

Question 6

frequency of radiation absorbed is proportional to

Answer 6

delta E and Bo (applied mag field)

Question 7

1H Chemical Shifts:

observe signals from protons in 1H in H NMR spec..

electron around the proton??

Answer 7

affects the signal

Question 8

chemical shift (gamma sign)

Answer 8

position of signal on the x-axis of spectrum

Question 9

local field

Answer 9

applied mag field induces a

Question 10

dissolve sample in deuterated solvent

a deuterated solvent is

Answer 10

something that does not have protons

CDCL3 or CD3OD

1H in CHCl3 interferes with 1 HNMR spectrum

Question 11

sample inside instrument with a probe

a probe

Answer 11

transmits radio freq and receives signal

Question 12

Free Induction Decay (FID)

Answer 12

signal recorded