Homework Answers
Add Answer to:
Question 10 (1 point) In 'H NMR, the proton attached to an sp-hybridized carbon is more...
Which of the following generally produce signals between 10 - 50 ppm in 13C NMR spectroscopy?...
Which of the following generally produce signals between 10 - 50 ppm in 13C NMR spectroscopy? sp3-hybridized carbon atoms (methyl, methylene, and methine groups) O sp-hybridized carbon atoms as well as sp3-hybridized carbon atoms that are deshielded by electronegative atoms sp2-hybridized carbon atoms O carbon atoms of carbonyl groups Give the number of different kinds of protons the compound that shows the H NMR spectrum shown below: Proton NMR ul ilu 3.0 2.8 2.6 2.4 2.2 2.0 1.8 1.6 1.4...
Question 3 (1 point) Identify the TRUE statement for the following molecule: H₂N-NH2 -ΝΗ o odo...
Question 3 (1 point) Identify the TRUE statement for the following molecule: H₂N-NH2 -ΝΗ o odo There are 3 formal positive charges There are 38 hydrogen atoms There are 16 sp2 hybridized carbon atoms There are 27 carbon atoms Search SE
-NMR and H-NMR – label both unambiguously and clearly illustrate that you understand proton and carbon...
-NMR
and H-NMR – label both unambiguously and clearly illustrate that
you understand proton and carbon environments (i.e. Draw out the
skeletal structure of the compound, label the H’s a, b, c’s and the
C’s 1, 2, 3’s. Then label all signals on the NMR with those
corresponding letters/numbers accordingly.).
We were unable to transcribe this imageWe were unable to transcribe this imageC7H140 CDCl3 240 200 QE-300 180 129 100
5. Examine the attached 'H NMR spectrum of the product that you are making today. What...
5. Examine the attached 'H NMR spectrum of the product that you are making today. What significant difference(s) are present (with respect to the spectrum of the dibromide product)? 6. For today's experiment, we are doing a reaction with trans-cinnamic acid using NBS (which effectively provides a dilute solution of bromine) in a mixture of water and methanol. Predict the four possible products of this reaction. Note the dibromide product is not a possibility here. (See question 2). For this...
Question 10 (1 point) Determine the compound that would produce the given NMR given below. 'H...
Question 10 (1 point) Determine the compound that would produce the given NMR given below. 'H NMR chemical s om onsoir novino in 4) HO Question 11 (1 point) Determine the compound that would produce the H NMR given below. 'H NMR
Question 5 (1 point) What is the hybridization and geometry of the carbonyl carbon in carboxylic...
Question 5 (1 point) What is the hybridization and geometry of the carbonyl carbon in carboxylic acids derivatives? sp3, tetrahedral sp2, trigonal planar O sp2, tetrahedral ( O sp3, trigonal planar ) ( O sp, trigonal planar )
13C NMR Signal and Chemical Shift tural abundance of the ich is 99.985% of hydrogen Sassi...
13C NMR Signal and Chemical Shift tural abundance of the ich is 99.985% of hydrogen Sassi The isotope 18C is another NMR active nucleus. The natural abundance isotope is only 1.1% of carbon atoms compared to the 'H isotope which is 99.985% of atoms. Therefore the intensity of WC peaks is lower. It takes a longer time to obtain a spectrum compared to a 'H NMR spectrum. Adjacent WC - WC splitting does occur. chance of two "C atoms being...
Question 26 1 pts 1. a) For the following benzene compound: CH3-C.CH4-CH3 (para), the total number...
Question 26 1 pts 1. a) For the following benzene compound: CH3-C.CH4-CH3 (para), the total number of non- equivalent hydrogens is 2: True/False True False Question 27 1 pts 1. b) CH3-C6H4-Cl (ortho), the total number of non-equivalent hydrogens is 3: True/False True False Question 28 1 pts 1. c) olefinic hydrogens (hydrogen attached to sp² hybridized carbon) give d values at about 3-4 ppm : True/False True False D Question 29 1 pts 1. d) in a 300 MHz...
Please help with these two questions regarding NMR, thanks! 1. In a proton NMR, a specific...
Please help with these two questions regarding NMR, thanks!
1. In a proton NMR, a specific carbon atom has 2 protons
attached directly to it, and its neighbor carbon has 3 and another
neighbor carbon has 1; what is the multiplicity of this?
3. Below is shown the spectra of C4H4O,
with a mass of 68amu (if your structure’s mass adding up has some
decimals left over this is fine). Your job is to write the
structure of it based...
QUESTION 9 Why does a proton NMR spectrum of the NMR solvent CDCl3 show a signal...
QUESTION 9 Why does a proton NMR spectrum of the NMR solvent CDCl3 show a signal at 7.26 ppm even if the CDC13 molecule contains no hydrogen? NMR solvent CDC13 contains some unknown impurity, which shows signal at 7.26 ppm. NMR solvent CDC13 contains very small % of CHCl3 impurity, which shows signal at 7.26 ppm. NMR solvent CDC13 has one deuterium, which is an isotope of hydrogen. That shows signal at 7.26 ppm. NMR solvent CDC13 has one carbon,...
Which of the following generally produce signals between 10 - 50 ppm in 13C NMR spectroscopy? sp3-hybridized carbon atoms (methyl, methylene, and methine groups) O sp-hybridized carbon atoms as well as sp3-hybridized carbon atoms that are deshielded by electronegative atoms sp2-hybridized carbon atoms O carbon atoms of carbonyl groups Give the number of different kinds of protons the compound that shows the H NMR spectrum shown below: Proton NMR ul ilu 3.0 2.8 2.6 2.4 2.2 2.0 1.8 1.6 1.4...
Question 3 (1 point) Identify the TRUE statement for the following molecule: H₂N-NH2 -ΝΗ o odo There are 3 formal positive charges There are 38 hydrogen atoms There are 16 sp2 hybridized carbon atoms There are 27 carbon atoms Search SE
-NMR
and H-NMR – label both unambiguously and clearly illustrate that
you understand proton and carbon environments (i.e. Draw out the
skeletal structure of the compound, label the H’s a, b, c’s and the
C’s 1, 2, 3’s. Then label all signals on the NMR with those
corresponding letters/numbers accordingly.).
We were unable to transcribe this imageWe were unable to transcribe this imageC7H140 CDCl3 240 200 QE-300 180 129 100
5. Examine the attached 'H NMR spectrum of the product that you are making today. What significant difference(s) are present (with respect to the spectrum of the dibromide product)? 6. For today's experiment, we are doing a reaction with trans-cinnamic acid using NBS (which effectively provides a dilute solution of bromine) in a mixture of water and methanol. Predict the four possible products of this reaction. Note the dibromide product is not a possibility here. (See question 2). For this...
Question 10 (1 point) Determine the compound that would produce the given NMR given below. 'H NMR chemical s om onsoir novino in 4) HO Question 11 (1 point) Determine the compound that would produce the H NMR given below. 'H NMR
Question 5 (1 point) What is the hybridization and geometry of the carbonyl carbon in carboxylic acids derivatives? sp3, tetrahedral sp2, trigonal planar O sp2, tetrahedral ( O sp3, trigonal planar ) ( O sp, trigonal planar )
13C NMR Signal and Chemical Shift tural abundance of the ich is 99.985% of hydrogen Sassi The isotope 18C is another NMR active nucleus. The natural abundance isotope is only 1.1% of carbon atoms compared to the 'H isotope which is 99.985% of atoms. Therefore the intensity of WC peaks is lower. It takes a longer time to obtain a spectrum compared to a 'H NMR spectrum. Adjacent WC - WC splitting does occur. chance of two "C atoms being...
Question 26 1 pts 1. a) For the following benzene compound: CH3-C.CH4-CH3 (para), the total number of non- equivalent hydrogens is 2: True/False True False Question 27 1 pts 1. b) CH3-C6H4-Cl (ortho), the total number of non-equivalent hydrogens is 3: True/False True False Question 28 1 pts 1. c) olefinic hydrogens (hydrogen attached to sp² hybridized carbon) give d values at about 3-4 ppm : True/False True False D Question 29 1 pts 1. d) in a 300 MHz...
Please help with these two questions regarding NMR, thanks!
1. In a proton NMR, a specific carbon atom has 2 protons
attached directly to it, and its neighbor carbon has 3 and another
neighbor carbon has 1; what is the multiplicity of this?
3. Below is shown the spectra of C4H4O,
with a mass of 68amu (if your structure’s mass adding up has some
decimals left over this is fine). Your job is to write the
structure of it based...
QUESTION 9 Why does a proton NMR spectrum of the NMR solvent CDCl3 show a signal at 7.26 ppm even if the CDC13 molecule contains no hydrogen? NMR solvent CDC13 contains some unknown impurity, which shows signal at 7.26 ppm. NMR solvent CDC13 contains very small % of CHCl3 impurity, which shows signal at 7.26 ppm. NMR solvent CDC13 has one deuterium, which is an isotope of hydrogen. That shows signal at 7.26 ppm. NMR solvent CDC13 has one carbon,...
Most questions answered within 3 hours.
-
This question is from the textbook "Python for ArcGIS" by Laura
Tateosian:
Write a script "triangles.py"...
asked 4 minutes ago -
1.What process is pushing back against gravity in the very
center (the core) of sun-like stars?...
asked 6 minutes ago -
Which of the following is an impediment that makes it
difficult for firms to achieve the...
asked 5 minutes ago -
Calculate the amount of heat needed to boil 123.g of octane
(C8H18), beginning from a temperature...
asked 13 minutes ago -
my
prof asked us to make a problem set then we find solve it
Chi-Square Test...
asked 20 minutes ago -
In recent years, 80% of those accused of Driving Under the
Influence (DUI) get convicted (includes...
asked 30 minutes ago -
Why does Max Weber distinguish between "power," "authority," and
different types of authority? What is he...
asked 30 minutes ago -
What would the solow growth model look like if there was a
production function which had...
asked 35 minutes ago -
A company project has an initial cost of $40,000, expected net
cash flows of $9,000 per...
asked 37 minutes ago -
How do you use strategy in your current position or how does
your current position align...
asked 39 minutes ago -
a person's ability to be properly diagnosed with a
disease/condition can be affected by the person;s...
asked 38 minutes ago -
John needs 40 Eternal Light flashlights. Each Eternal Light
flashlight requires 3 bulbs, and each bulb...
asked 46 minutes ago