Need some help. What is the unknown counpund? What is the Index if Hydrogen Defincienct ?Is the carbonyl stretch at 1692 a ketone or an aldehyde? The stretch at 1632 and 2972 is indicative of a alkene, correct? is there an OH present? if you can please explain the H-NMR, what type of proton and how many protons does it represent.
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Homework Answers
The unknown compound could be as right as written (E) pent-2-enal .
The carbonyl stretch at 1692 usually represents an amide group but it can be aldehyde or ketone due to the presence of conjugation thus lowering the streching frequency.
Alkene (C=C) stretches appear around 1,660 cm–1, and are of either weak or medium intensity .
As there is no broad band present , this indicates the absence of alcoholic group.
There are 4 kinds of hydrogen present- 1st will be the aldehydic proton which will occur at 9-10 ppm , 2nd one will be the hydrogen preesnt on the sp2 carbons , they will lie in the alkene region with 4.5 -6.5 ppm with trans coupling, 3rd one will be the of the carbon CH2 which will lie near 3.8 ppm due to the presence of alkenic bonds and 4th one will be the hydrogens of methyl group which have its chemical shift around 1.2 ppm.
H3C--CH2--CH=CH--CHO
Add Answer to:
Need some help. What is the unknown counpund? What is the Index if Hydrogen Defincienct ?Is the c...
For molecule C. What is the multiplicity (singlets, doublets,..) of each proton that is obtained in...
For molecule C.
What is the multiplicity (singlets, doublets,..) of each
proton that is obtained in the 1H-NMR spectrum?
For molecule D.
Explain the value of the chemical displacement of the protons
in both methyl groups at -4.2ppm
We were unable to transcribe this imageWe were unable to transcribe this image
Hello! I am in OCHEM 2 and im trying to figure out what my unknown is. Based off my many tests, the unknown has multiple bonds and a boiling point of 39-41 degrees celsius. Attached is the IR and NMR....
Hello! I am in OCHEM 2 and im trying to figure out what my
unknown is. Based off my many tests, the unknown has multiple bonds
and a boiling point of 39-41 degrees celsius. Attached is the IR
and NMR. I think my unknown is 1-pentyne. The unknown I have has a
very pungent smell. The molecular formula is not given as the
unknown is not given. A list of 35 possible unknowns are given.
Name / Structure
BP (°C)...
Unknown Number: Molecular Formula: Index of Hydrogen Deficiency: Structure: Mass Spec Molecular Weight: Important Fragments; what...
Unknown Number:
Molecular Formula:
Index of Hydrogen Deficiency:
Structure:
Mass Spec
Molecular Weight:
Important Fragments; what are they and what do they mean? (base
peak structure, is there a halogen, is there a benzene ring, is
there an odd number of nitrogens, other important fragments that
tell something about the structure)
IR
Is there an OH? Wavenumber?
Is there a carbonyl group? If so what type (acid. ester, amide,
aldehyde, ketone etc.)? Wave number?
Other important peaks (terminal alkyne, cyano...
what do these tables tell you about the compound, can you also give the structure Table...
what do these tables tell you about the compound, can
you also give the structure
Table 1. IR Data Functional Group IR band (observed) IR band (reference) Ketone 1705 1690-1720 sp-H 2950 2900-3000 We were unable to transcribe this imageTable 3. C-NMR Data Carbon Chemical Shift Structure/Fragment 212 -C=0 48 C - C = 0 28 at Le CHE-C = 0 . CH, -C-C-C - CH CH, -C-C-C- CH 10 Structure Table 1. IR data Functional group Aliphatic ketone sp3-H...
predict the product. explain how would you get the correct answers to the 3 questions. We...
predict the product.
explain how would you get the correct answers to the 3
questions.
We were unable to transcribe this imageWe were unable to transcribe this image2. Synthesize the following compound using the Wittig reaction (6 points) 3 Carbons - 4 carbone 3. Synthesize the following compound using the correct aldehyde or ketone and t Grignard reagent. (6 points) OH OH Hovho Con 10 2. Show how you can synthesize the following alkene from cyclopentanol. (Hint 3 Stop) Him...
ISL dll ULU FT-IR: What functional groups are present in your unknown? List IR frequencies and...
ISL dll ULU FT-IR: What functional groups are present in your unknown? List IR frequencies and functional groups. 2 NMR: What information about your unknown can you get from the NMR? 3 MS: What is the possible molecular weight of the unknown? What other mass information is available for the mass spectrum? Index of Refraction: What is the refractive index of your liquid unknown? How does it compare to literature values of your liquid unknown? 5 What is the identity...
Question 4. Suppose for i=1,...,n both the mean and variance are unknown. Based on n=100 sample...
Question 4. Suppose for i=1,...,n both the mean and variance are unknown. Based on n=100 sample data, we would like to test vs a) at a type 1 error level , find a sample statistic T and the rejection region R that correctly controls exactly, i.e., find T and R that satisfy (must be exact in distribution not approximate). b) Compute the asymptotic power of T, i.e., what does converge to as sample size goes to infinity? Question 5. Following...
What are (a) the x component, (b) the y component, and (c) the z component of...
What are (a) the x component,
(b) the y component, and
(c) the z component of
if
,
, and
. (d) Calculate the angle between
and the positive z axis. (e) What is the
component of
along the direction of
? (f) What is the magnitude of the component of
perpendicular to the direction of
but in the plane of
and
?
We were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe...
I have most of the information, but I need help to organize it based on the...
I have most of the information, but I need help to organize it
based on the prompts below the pictures.
Mass Spec
Molecular Weight:
Important Fragments; what are they and what do they mean? (base
peak structure, is there a halogen, is there a benzene ring, is
there an odd number of nitrogens, other important fragments that
tell something about the structure)
IR
Is there an OH? Wavenumber?
Is there a carbonyl group? If so what type (acid. ester, amide,...
5. You decide to also book some time on the proton spectra to help you identify...
5. You decide to also book some time on the proton spectra to help you identify the the key chemical shifts. to also book some time on the NMR to obtain both a Carbon and a tra to help you identify the compound. Given the following spectra label ty BOL'S9 BOLON ZULL ZOZO UZI SPLOZI 60SS SZI SOCSOL- We were unable to transcribe this image
For molecule C.
What is the multiplicity (singlets, doublets,..) of each
proton that is obtained in the 1H-NMR spectrum?
For molecule D.
Explain the value of the chemical displacement of the protons
in both methyl groups at -4.2ppm
We were unable to transcribe this imageWe were unable to transcribe this image
Hello! I am in OCHEM 2 and im trying to figure out what my
unknown is. Based off my many tests, the unknown has multiple bonds
and a boiling point of 39-41 degrees celsius. Attached is the IR
and NMR. I think my unknown is 1-pentyne. The unknown I have has a
very pungent smell. The molecular formula is not given as the
unknown is not given. A list of 35 possible unknowns are given.
Name / Structure
BP (°C)...
Unknown Number:
Molecular Formula:
Index of Hydrogen Deficiency:
Structure:
Mass Spec
Molecular Weight:
Important Fragments; what are they and what do they mean? (base
peak structure, is there a halogen, is there a benzene ring, is
there an odd number of nitrogens, other important fragments that
tell something about the structure)
IR
Is there an OH? Wavenumber?
Is there a carbonyl group? If so what type (acid. ester, amide,
aldehyde, ketone etc.)? Wave number?
Other important peaks (terminal alkyne, cyano...
what do these tables tell you about the compound, can
you also give the structure
Table 1. IR Data Functional Group IR band (observed) IR band (reference) Ketone 1705 1690-1720 sp-H 2950 2900-3000 We were unable to transcribe this imageTable 3. C-NMR Data Carbon Chemical Shift Structure/Fragment 212 -C=0 48 C - C = 0 28 at Le CHE-C = 0 . CH, -C-C-C - CH CH, -C-C-C- CH 10 Structure Table 1. IR data Functional group Aliphatic ketone sp3-H...
predict the product.
explain how would you get the correct answers to the 3
questions.
We were unable to transcribe this imageWe were unable to transcribe this image2. Synthesize the following compound using the Wittig reaction (6 points) 3 Carbons - 4 carbone 3. Synthesize the following compound using the correct aldehyde or ketone and t Grignard reagent. (6 points) OH OH Hovho Con 10 2. Show how you can synthesize the following alkene from cyclopentanol. (Hint 3 Stop) Him...
ISL dll ULU FT-IR: What functional groups are present in your unknown? List IR frequencies and functional groups. 2 NMR: What information about your unknown can you get from the NMR? 3 MS: What is the possible molecular weight of the unknown? What other mass information is available for the mass spectrum? Index of Refraction: What is the refractive index of your liquid unknown? How does it compare to literature values of your liquid unknown? 5 What is the identity...
What are (a) the x component,
(b) the y component, and
(c) the z component of
if
,
, and
. (d) Calculate the angle between
and the positive z axis. (e) What is the
component of
along the direction of
? (f) What is the magnitude of the component of
perpendicular to the direction of
but in the plane of
and
?
We were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe...
I have most of the information, but I need help to organize it
based on the prompts below the pictures.
Mass Spec
Molecular Weight:
Important Fragments; what are they and what do they mean? (base
peak structure, is there a halogen, is there a benzene ring, is
there an odd number of nitrogens, other important fragments that
tell something about the structure)
IR
Is there an OH? Wavenumber?
Is there a carbonyl group? If so what type (acid. ester, amide,...
5. You decide to also book some time on the proton spectra to help you identify the the key chemical shifts. to also book some time on the NMR to obtain both a Carbon and a tra to help you identify the compound. Given the following spectra label ty BOL'S9 BOLON ZULL ZOZO UZI SPLOZI 60SS SZI SOCSOL- We were unable to transcribe this image
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