NMR Spectroscopy

Question 1

what does NMR stand for?

Answer 1

nuclear magnetic resonance

Question 2

which nuclei have nuclear spin?

Answer 2

those with an odd number of protons/neutrons

Question 3

what does TMS stand for?

Answer 3

tetramethylsilane

Question 4

what is the value of the TMS peak?

Answer 4

0 ppm

Question 5

what is the purpose of the TMS peak?

Answer 5

used as point of reference

Question 6

chemical shift is ___ proportional to frequency of signal

Answer 6

directly

Question 7

chemical shift is ____ proportional to spectrometer frequency

Answer 7

inversely

Question 8

a higher frequency of signal means a ___ chemical shift

Answer 8

greater

Question 9

a higher spectrometer frequency means a ___ chemical shift

Answer 9

lesser

Question 10

what can be used to indicate the # of H in a signal?

Answer 10

integration/measuring the area under the signal

Question 11

which rule is used to predict multiplicity?

Answer 11

n+1

Question 12

what are 2 factors that affect chemical shifts in C13 NMR?

Answer 12

1. electronegativity of groups attached to C

2. hybridization of each carbon

Question 13

what does DEPT stand for?

Answer 13

distornionless enhancement by polarization transfer