CINNAMALDEHYDE
The COSY spectrum of trans-cinnamaldehyd clearly shows the correlations betweenthe aldehyde proton (CHO) at 9.73 ppm and the alkene CH proton at position 2. The CH protons atpositions 2 and 3 are also coupling to each other.
COSY correlations are also observed between thearomatic protons at positions 5, 6 and 7.
Trans- cinnamaldehyde.13C spectrum, IR , NMR
trans-cinnamaldehyde.
This 13C spectrum exhibits resonances at the following chemical shifts, and with the multiplicity indicated:
| Shift (ppm) | |
| 193.6 | 129.1 |
| 152.6 | 128.6 |
| 134.2 | 128.4 |
| 131.2 | |
128.4 CH para to functional gp
128.6 TWO CH ORTHO TO FUNCTIONAL GP
129,1 TWO CH META TO FUNCTIONAL GP
131.2 CH=CH.CHO
134.2 AR CH ATTACHED TO FUNTIONAL GP
152.6 CH=CH.CHO
193.6 C=0
USE BELOW 13C NMR FOR BETTER INTERPRETATION
1H NMR
IR
SEE
South African Journal of Chemistry
On-line version ISSN 1996-840X
S.Afr.j.chem. (Online) vol.66 Durban Aug. 2013
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