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9 Cards in this Set
- Front
- Back
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What is HNMR best at showing?
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-the amount of H in cmpd
-what they're bonded to -what atoms or grps surround them -relative amts of each type |
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B spin state is what kind of energy? And Alpha?
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Beta spin is against applied energy field with HIGHER energy
Alpha is with applied energy field and LOWER energy |
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What makes alpha flip to beta?
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When light energy (hv)=E
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What 'shields' effect NMR?
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e- generate their own magnetic field, and slightly 'shield' p from the effects of external eletromgn field (F,Cl)
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What are the five chemical shifts to know?
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0 TMS
3 O-C-H 5 C=C-H (sp2) 7 benzene ring 9 O=C-H (aldehyde) |
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What is the 'rule' for splitting?
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H+1
ex: H H H-C-C-Cl Left is a triplet H H Right is a Quartet |
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Non equivalent splitting leads to what?
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Multiplet, multiply the quartet * the triplet to get the number of peaks
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In HNMR what two protons would show up as broad, rounded peaks?
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-OH and -NH
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For 13-CNMR what happens to Aldehaydes and Ketones?
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-one of the most deshielded C's existing
-usually above 220 |
