Chem 353-22

Chem 353-22 - HETCOR (1H-13C/directly bonded) HMBC...

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Unformatted text preview: HETCOR (1H-13C/directly bonded) HMBC (1H-13C/3 bonds apart) (ppm) 40 60 80 100 120 140 160 180 200 8.5 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 (ppm) Caffeine 13 12 11 10 9 8 7 6 5 4 3 2 1 ppm (ppm) 3.0 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 COSY (1H-1H/3-4 bonds apart) 8.0 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 (ppm) 220 200 180 160 140 120 100 80 60 40 ppm 20 ...
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