5) Interpret the partial spectrum ("H, 500 MHz) of the triene shown below and assign stereochemistry to the two double bonds. Me. HE "Ha Megsi Hc. Me Me Ho a) On the partial spectrum (500 MHz) below, clearly mark the assignments of the protons HA to Hg. 6.60 6.55 6.50 6.05 6.00 5.95 5.90 5.85 5.80 5.75 5.70 5.65 5.60 ppm b) Report the muitiplets below in the standard format (8, multiplicity, and Jvalues). Ha Ha Н Ho H. c) What is the stereochemistry at the H, - He double bond? Briefly explain. 60 6.540 6. 538 E9S 9 095 9 6.013 200'9- G00'S 986'S 620'9- C06'S -5.695 -5.688 5.686 269'S - 5.684 -5.681 5.679 E99'S - 199'S-
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The electromagnetic radiation or frequency is classified into radio-waves, micro-waves, infrared, visible, ultraviolet, X-rays and gamma rays. The infrared spectra emission refers to the portion between the visible and the microwave areas of electromagnetic spectrum. This spectral area is usually divided into three parts, near infrared (14,290 – 4000 cm-1), mid infrared (4000 – 400 cm-1), and far infrared (700 – 200 cm-1), respectively. The number set is the number of the wave (cm-1).
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IR Spectroscopy
Infrared (IR) or vibrational spectroscopy is a method used for analyzing the particle's vibratory transformations. This is one of the very popular spectroscopic approaches employed by inorganic as well as organic laboratories because it is helpful in evaluating and distinguishing the frameworks of the molecules. The infra-red spectroscopy process or procedure is carried out using a tool called an infrared spectrometer to obtain an infrared spectral (or spectrophotometer).
![5) Interpret the partial spectrum ("H, 500 MHz) of the triene shown below and assign stereochemistry to the two double
bonds.
Me.
HE
"Hp
MezSi
Hc
H Me Me
a) On the partial spectrum (500 MHz) below, clearly mark the assignments of the protons Ha to Hạ.
6.60
6.55
6.50
6.05
6.00
5.95
5.90
5.85
5.80
5.75
5.70
5.65
5.60
ppm
b) Report the multiplets below in the standard format (8, multiplicity, and Jvalues).
HA
Ha
Ho
H.
c) What is the stereochemistry at the H, - He double bond? Briefly explain.
d] What is the stereochemistry at the Ho - He double bond? Briefly explain
6. 563
095 9
- 6.540
6. 538
620'9
6.013
200'9
GG6'S
5.977
-5.949
660 C -
269'S-
S69'S-
889'S -
989'S
5.684
5.681
5.679
E99'S
5.661
GCD'S](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F06e2fe3f-6c13-4c96-9326-184a465053c7%2F22e83e35-1710-4ca3-b8ae-9af205f50ef0%2Fge1ctpj_processed.jpeg&w=3840&q=75)
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