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9 Cards in this Set

  • Front
  • Back
What is HNMR best at showing?
-the amount of H in cmpd
-what they're bonded to
-what atoms or grps surround them
-relative amts of each type
B spin state is what kind of energy? And Alpha?
Beta spin is against applied energy field with HIGHER energy
Alpha is with applied energy field and LOWER energy
What makes alpha flip to beta?
When light energy (hv)=E
What 'shields' effect NMR?
e- generate their own magnetic field, and slightly 'shield' p from the effects of external eletromgn field (F,Cl)
What are the five chemical shifts to know?
3 O-C-H
5 C=C-H (sp2)
7 benzene ring
9 O=C-H (aldehyde)
What is the 'rule' for splitting?
ex: H H
H-C-C-Cl Left is a triplet
H H Right is a Quartet
Non equivalent splitting leads to what?
Multiplet, multiply the quartet * the triplet to get the number of peaks
In HNMR what two protons would show up as broad, rounded peaks?
-OH and -NH
For 13-CNMR what happens to Aldehaydes and Ketones?
-one of the most deshielded C's existing
-usually above 220