NMR (500 MHz) 7.75 7.70 7.65 7.60 -7.63 -7.60 -7.50 -7.48 7.55 7.50 7.45 7.40 7.35 -7.18 -6500000 -6000000 -5500000 -5000000 4500000 -4000000 -3500000 -3000000 -2500000 -2000000 -1500000 -1000000 -500000 -500000 7.30 7.25 7.20 f1 (ppm) 7.15 7.10 7.05 7.00 6.95 6.90 6.85 6.80 NMR (500 MHz) -1.59 -6500000 -6000000 -5500000 5000000 -4500000 -4000000 -3500000 -3000000 -2500000 -2000000 -1500000 -1000000 -500000 ידיידי 861 T 2.99 3.00- 500000 8.0 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 f1 (ppm)

Principles of Instrumental Analysis
7th Edition
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Chapter34: Particle Size Determination
Section: Chapter Questions
Problem 34.9QAP
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Hello! I have a 500 Hz H-NMR for 1,5-bis-(4-methoxyphenyl)-penta-1,4-dien-3-one. I need to label the signals with the corresponding H's. Then, find out if the two alkenes are cis or trans by calculating the J values. 

I believe that I have the H-NMR labeled correctly, but not sure if I got the J values correct to determine if the two alkenes in the compound will make the compound cis or trans. 

NMR (500 MHz)
7.75
7.70 7.65 7.60
-7.63
-7.60
-7.50
-7.48
7.55 7.50
7.45 7.40
7.35
-7.18
-6500000
-6000000
-5500000
-5000000
4500000
-4000000
-3500000
-3000000
-2500000
-2000000
-1500000
-1000000
-500000
-500000
7.30 7.25 7.20
f1 (ppm)
7.15
7.10
7.05
7.00
6.95
6.90 6.85
6.80
Transcribed Image Text:NMR (500 MHz) 7.75 7.70 7.65 7.60 -7.63 -7.60 -7.50 -7.48 7.55 7.50 7.45 7.40 7.35 -7.18 -6500000 -6000000 -5500000 -5000000 4500000 -4000000 -3500000 -3000000 -2500000 -2000000 -1500000 -1000000 -500000 -500000 7.30 7.25 7.20 f1 (ppm) 7.15 7.10 7.05 7.00 6.95 6.90 6.85 6.80
NMR (500 MHz)
-1.59
-6500000
-6000000
-5500000
5000000
-4500000
-4000000
-3500000
-3000000
-2500000
-2000000
-1500000
-1000000
-500000
ידיידי
861
T
2.99
3.00-
500000
8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
f1 (ppm)
Transcribed Image Text:NMR (500 MHz) -1.59 -6500000 -6000000 -5500000 5000000 -4500000 -4000000 -3500000 -3000000 -2500000 -2000000 -1500000 -1000000 -500000 ידיידי 861 T 2.99 3.00- 500000 8.0 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 f1 (ppm)
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