CH1 summary vocab Flashcards
1
Q
chemical shift?
A
the position of an NMR signal
2
Q
signal splitting is caused by?
A
spin-spin coupling
3
Q
what is signal splitting?
A
indicates the number of hydrogen atoms on adjacent carbons
4
Q
signal splitting follows what rule?
A
the n+1 rule
n= is the number of equivalent hydrogen atoms separated by three or fewer bonds
5
Q
chemical shifts can be described by what 2 ways?
A
higher frequency and lower frequency
6
Q
higher frequency
A
toward larger ppm values
7
Q
lower frequency
A
toward smaller ppm values
8
Q
higher frequency signals result from ___ which is caused by
A
deshielding, caused by decreased density around the nucleus and electron withdrawing group
9
Q
lower frequency signals result from___which
A
shielding, caused by higher electron density around a nucleus and elecctron donating
