_Infra-Red (IR)- Nuclear Magnetic Resonance (NMR)
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Lab 1 Report : Infra-Red (IR)- Nuclear Magnetic Resonance
(NMR)
Exercises In Molecular Spectrosc
opy- Structural Determination
Chem 2425
Prof: Dr. Cherif
Introduction: The purpose of these two techniques is to identify an organic compound's structure. When it comes to revealing whether or not particular functional groups are present, IR (
Infrared Spectroscopy) is most helpful. When comparing samples, IR can produce a molecular fingerprint that can be utilized. Two pure samples may be considered to be the same compound if their infrared spectra match. Nuclear Magnetic Resonance (NMR) spectroscopy is used to analyze and present data regarding the structure and composition of molecules. Although each of
the options is somewhat relevant, the most accurate response is that NMR spectroscopy makes it possible to identify a compound's carbon-hydrogen framework.
Experiment Procedure:
In this case problems 8, 9, and 10 were assigned so, use the following spectrums to identify the structure of each compound in the text or any other organic text study text.First calculate degree of unsaturation by using the following formula: 1 + c - ½ ( H-X+N). Compounds can be distinguished using IR spectroscopy according to the bond vibrations in each one. mostly done by shining a broad-spectrum light source onto the sample through an interferometer, which blocks all but a few wavelengths of light at a time. The light intensities for every interferometer setting are measured by an infrared detector. In order to find what functional groups are the spectrum showing it’s necessary to check the table and observe the absorption range which is the
wavenumber, and the intensity percentage. Once the functional group was found, move to the NMR, and find each type's 1H NMR chemical shift in the spectrum. Chemical shift, which indicates a signal's location on the NMR spectrum, is measured in parts per million (ppm). It represents the electronic surrounding field of the NMR-active nuclei. Numerous elements, including hybridization, adjacent atoms, and electronegativity, affect the chemical shift. Additional information can be obtained from the shape of peaks. Broad peaks, for instance, can be a sign of dynamic molecular processes or exchangeable protons. The NMR will tell how many CH3, CH2, CH and which one is single, double, triple, quadrant, or multiple.The molecule and it will also confirm if the molecule is alcohol, alkyl, vinylic, halogen, etc. Once it was determined how many CH3, CH2, or CH are in the molecule the only thing left is to join all those molecules just like if it was a puzzle.
Results and Discussion:
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Related Questions
Data for Problem 2
ZOO
180 150
120
140
100
80
770
дом
-8
60
40 20
10
9
a
5
015
100
80
Relative Intensity
8
ส
20
20
40
50
ppm
septet
3
2
60
70
80
90
100
m/z
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Please help me complete this table
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Use the flow chart and chemical structures shown to answer the question below.
X, Y, and Z
in diethyl ether
• add HCI (aq)
• separate
HN.
но
Вох 1
Вох 2
NH2
CH:
organic phase
aqueous phase
X
Y
Z
• add NaOH (aq)
• separate
• add NaOH (ag)
• add diethyl ether
• separate
Воx 5
Вох 6
aqueous phase
Вох 3
Вох 4
organic phase
aqueous phase
organic phase
• add HCI (aq)
• add diethyl ether
• separate
T
Воx 7
Вох 8
organic phase
aqueous phase
Which compound(s) will be found in Box 4 layer? [Choose all that apply]
n Y
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Be sure to answer all parts.
Draw an organic compound that fits each set of criteria.
an alkene that has the double bond in a six membered ring
draw structure.
an amide that has the molecular formula C3H¬NO
draw structure .
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The structure of estrone, a female sex hormone, is shown below. Highlight and identify all of
the functional groups.
но
Estrone
Dihydroxyacetone (DHA), also known as glycerone, is the active ingredient in sunless tanning
products. DHA has the same molecular formula as glyceraldehyde, an important intermediate
in the metabolism of glucose. Highlight and label all the functional groups in DHA and
glyceraldehyde. What is the molecular formula for DHA and glyceraldehyde? What type of
isomers are DHA and glyceraldehyde?
OH
но,
HO,
LOH
DHA
Glyceraldehyde
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1.
For the compound below, answer all of the following questions.
(i)
Identify and name two functional groups on the structure.
(ii)
Identify one polar bond and draw partial charges on the atoms involved.
(iii) Identify two basic sites and predict which one will be the more reactive.
Br
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Chloroform CHCl3
is your compound saturated or unsaturated? Do any geometric isomers exist in point format
what functional groups does your chemical contain in point format
And add any other information that you learned about chloroform in point format
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What is the IUPAC name for the given compound?
H3C.
H3C
IUPAC name:
SEP
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CH₂
CH2.
CH2
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CH3
CH2
CH2
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Write the systematic (IUPAC) name for each of the following organic molecules:
HO
structure
OH
HO
I Don't Know
OH
HO.
CH3-C-CH₂-CH-CH3
CH3
ОН
Submit
Q Search
name
0
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3-I.d. Compound
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Aromatic compounds got their name because many have
strong smells. Benzene, toluene, aniline, and phenol are
common structures from which most aromatic
compounds are derived. (Figure 1) When naming
aromatic compounds with three or more substituents, the
ring is numbered to give the smallest possible set of
numbers. For example, this phenol derivative (Figure 2)
is called 4-bromo-3-chlorophenol. The substituents
Figure
CH3
NH₂
1 of 2 >
OH
benzene toluene aniline phenol
Name the following molecule by its IUPAC name.
► View Available Hint(s)
Submit
Part B
Name the following molecule by its IUPAC name.
CI
Br
CH3
CI
Br
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Pls help ASAP
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Identify the functional groups in the following molecules.
(Use names from the table below. List each class of functional group only once. If there are fewer than 3 functional groups, leave an appropriate number of answer boxes
empty.)
a)
b)
s
epibatadine, analgesic from skin of
neotropical frog, 200x potency of morphine
OH
Name Structure
Alkene
Alkyne
Structures of Some Common Functional Groups
Arene
Halide.
Alcohol
-C=C1
X*
(X=F, Cl, Br, 1)
Nitro
Thiol
Name
Aldehyde
Ketone
Carboxylic Acid
Structure
XSH
i
**
OH
W
Previous
Next
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Pls help ASAP
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what is the functional group in this molecule?
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=
Draw the skeletal ("line") structure of an isomer of this molecule:
!
1
A
O PRINCIPLES OF ORGANIC CHEMISTRY
Drawing the skeletal structure of a constitutional isomer
HO
Explanation
2
W
S
OH
Click and drag to start drawing a
structure.
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Identify which of the following functional groups appear in the molecule shown below. (Note that some of the functional groups will
not be listed as an answer option)
This compound is being investigated as a potential feedstock for polymer production.
مملستم
O Ketone
O Ether
O Alkene
O Carboxylic Acid
O Alcohol
Methyl Oleate
CH
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Norethynodrel, a component of the first combined oral contraceptive, has the following structure. Identify the functional groups
indicated in Norethynodrel.
II
IV
OH
O 1 = aldehyde; II = alkyne; I|| = alcohol; IV = alkene
O1 = ketone; || = alkene; III = alcohol; IV = alkyne
O 1 = ketone; || = aromatic; I|| = alcohol; IV = alkyne
O 1 = anhydride; II = alkene; III = carboxylic acid; IV = alkene
O 1 = ester; II = alkene; III = alcohol; IV = alkyne
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Please help
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a) Which of the structural elements are in the natural compound "Jacobin"?
Please assign the correct names of the structural elements within the boxes.
primary amine (1); secondary amine (2); tertiary amine (3); primary alcohol (4); secondary alcohol (5);
tertiary alcohol (6); carboxylic acid (7) carboxylic acid ester (8); carboxylic acid amide (9); carboxylic acid
halide (10); carboxylic acid anhydride (11); nitrile (12); alkene (13); alkyne (14); alkylhalogenide (15);
epoxide (16); acyclic ether (17); aromate (18); Nucleobase (19); a-aminoacid (20); ketone (21); aldehyde
(22); monosaccharide (23); conjugated Diene (24).
b) Determine the absolute configuration using the System of Cahn, Ingold und Prelog at the stereogenic
center, which is highlighted with an asterisk (*). (Explain your assumption).
O
*
HO CH3
CH3 NH
O IZ
(Jacobin)
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CH₂O-C-(CH2) 16CH3
O
CHO–C—(CH2) 16CH3
18
O
CH₂O-C-(CH2) 16CH3
f. What is the name of the type of functional group that you see in the structure? Write
Your Answer Here.
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The functional group is the center of reactivity in an organic molecule. Identify the functional groups in the ff. structures. If a functional group is found more than once, it need be to be circled once.
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please help with all parts (a-c). I do not understand
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Write the systematic name of each organic molecule:
CH3
—
structure
CH2
||
OH
C-CH-CH3
HO–CH2–CH2–CH
CH3
||
C-CH2-OH
||
OH
ད་རིས་ལས་མ་
CH3-
CH-CH2OH
CH3
name
ك
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Ⅲ水
Organic Functional Groups
Naming and drawing ketones
Draw the condensed structure of 3,4-dihydroxy-2-pentanone.
Explanation
Click anywhere to draw the first
atom of your structure.
Check
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F3
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F10
-
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One of the compounds above is an amino acid. Identify this compound by placing a circle around the appropriate displayed formula in the table above.
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Question 4 of 35
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Consider the condensed structure shown.
CH3CHCH2CHCH 3
CH3 CH3
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Chapter 4 HW - General, Organic, and Biological Chemistry for H
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Draw the expanded, or complete, structural formula for this structure. Include all hydrogen atoms.
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Draw
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CH
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15. Identify the functional group(s) in each compound
i
CH3CH₂CCH3
2-butanone
(a solvent for paints and lacquers)
a)
H₂NCH₂CH₂CH₂CH₂CHCOH
Lysine
NH₂
(one of the 20 amino acid
building blocks of proteins)
c)
9
i
HOCCH₂CH₂CH₂CH₂COH
Hexanedioic acid
(the 2nd component of nylon-66)
b)
i
HOCH₂CCH₂OH
Dihydroxyacetone
(a component of several
artificial tanning lotions)
d)
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A. Encircle and identify the functional groups of the following molecules. (There may be more than one answer)
CH3
2. CHa-с-он
ČH3
1. Ibuprofen, a pain reliever :
OH
CH
Ibuprofen
3. Acctone, made by the body when it breaks down fat:
H3C
`CH3
4. Capsaicin, the pungent substance in chili peppers:
Но
5. Arecoline, a veterinary drug used to control worms in animals:
ČH3
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