Draw dibenzalacetone structure with fragmentation evidence 1. M/Z of 235, 234, 233, 157, 131, 115, 103, 77, 51 2. the %...
Draw dibenzalacetone structure with fragmentation evidence
1. M/Z of 235, 234, 233, 157, 131, 115, 103, 77, 51
2. the % intensity
3. Fragment ion structure
Homework Answers
Dibenzalacetone ( C17H14O) mass spectrum :
- m/z : 235 is (M+1) peak due to 13C, its intensity is 17*1.1 = ~19 % of parent peak.
- m/z : 234 is (M+.) peak is parent peak, its relative intensity is 100 % : it is base peak due to molecular ion.
- m/z : 233 is (M-1) peak due to loss of H. from molecular ion its relative intensity may be half of parent peak.
- m/z :157 is (M-77) peak due to loss of benzene radical ; its relative intensity will be very less due to instability and further fragmentation.
- m/z :131 is (M-103) peak due to loss of acetylene from m/z:157 ; its relative intensity will be ~40 % , is quite stable due to stability of +ve charge by oxygen; it may give further fragmentation. This fragmentation shows the presence of m/e ion 131 which shows the release benzaldehyde ion.
- m/z :103 is (M-131) peak : this fragmentation of m/e 103 shows the release of carbonyl ion , its relative intensity will be higher ~60% , due to resonance stability .
- m/z :77 is (M-157) peak (~50% intensity ) and m/z :51 is (M-183) peak (~33 % intensity): these fragmentation show the presence of benzene ions and futher fragmentation.
- m/z : 115 ; very less intense peak, probably coupling of carbonyl and benzene cation radical.
Add Answer to:
Draw dibenzalacetone structure with fragmentation evidence 1. M/Z of 235, 234, 233, 157, 131, 115, 103, 77, 51 2. the %...
Show the fragmentation pattern of the following. 1. 3-Phenyl-2-propenal (C9H80) with MW = 132.16 51 77...
Show the fragmentation pattern of the following. 1. 3-Phenyl-2-propenal (C9H80) with MW = 132.16 51 77 103132 relative intensity +0 mass/charge (m/z) 2. 4-Heptanone (C7H140) with MW = 114.19 + + relative abundance + 114 + +0 mass/charge (m/z)
The compound is dibenzalacetone MS 100 - MS-NW-6013 Relative Intensity 20 40 60 80 160 180 200 220 240 100 120 14...
The
compound is dibenzalacetone
MS 100 - MS-NW-6013 Relative Intensity 20 40 60 80 160 180 200 220 240 100 120 140 m/z Peak data 1) (%BP) m/z m/z 50.0 51. 01 76.0 77.0 78.0 89.0 91.0 102.0 103.0 104.0 115,0 5.7 18.1 5.4 48.7 5.5 5.1 26.6 13.0 61.6 9.5 5.8 129.0 131.0 132.0 156.0 157.0 191.0 205. 01 206.0 233.0 234.0 235.0 (a) (%BP) 7.3 42.7 $4.8 10.3 4.1 9.0 15.3 8.4 68.6 100.0 18.1 Report only the...
2. Draw the structure of the cation responsible for the base peak (m/z=58) in the mass...
2. Draw the structure of the cation responsible for the base
peak (m/z=58) in the mass spectrum of 3-aminopentane shown
below:
3. Below is given the mass spectrum of a simple alkane. What is
the chemical formula of the alkane? What is the name of the alkane?
Explain how you determined the exact structure of the alkane from
the observed fragments.
4. Below is a mass spectrum of an ester. Identify the ester.
Consider that the dominant fragmentation pathway involves...
18. The mass spectrum of 2-methylpentan-3-ol is shown below. Draw the structure of the fragment ions of m/z= 73 and...
18. The mass spectrum of 2-methylpentan-3-ol is shown below. Draw the structure of the fragment ions of m/z= 73 and 59. Relative abundance (%) TTT 10 20 80 80 100 120 mi
CH3 Cl 100 Base 10) The El-MS of 2-chloro-2- methylpropane is shown at right. Draw the...
CH3 Cl 100 Base 10) The El-MS of 2-chloro-2- methylpropane is shown at right. Draw the structure of the cation corresponding to the base peak. Clearly indicate where the charge resides. You need only show one of the two resonance forms. MS-NW-1505 no parent ion detected 92- Relative Intensity 10 15 20 25 30 35 40 55 60 65 70 75 80 45 50 m/z The 3:1 ratio of peak intensities at 77 and 79 m/z in the El-MS above...
Determination of Molecular Structure from molecular formula, mass, IR, and Mass Spec data. Molecular Weight: 134.22...
Determination of Molecular Structure from molecular
formula, mass, IR, and Mass Spec data.
Molecular Weight: 134.22
Molecular Formula: C10H14
I need help finding the structure.
IR Data (3300-2650 Range):
*No peaks between 2650 and 2100*
IR Data (2100-600 Range):
MS Data (Two different views):
MS Peaks Labeled:
Transmittance 60 80 100 3250 43088.1; 95. +3060.1; 93.5 -3022.9; 93.9 2961.4; 64.843 3200 3150 3100 3050 3000 Wavenumber (cm-1) 2950 TTTTTTTTTTTTTIIIIIITTTTTTTTTTTTTTTTTTTTTTTTTTT 29002850 2800 2750 2700 2650 2903.6; 86.663 2866.3; 86.398 20... 40...
1. Based on the elemental analysis for the unknown organic compound, calculate the empirical formula. If...
1. Based on the elemental analysis for the unknown
organic compound, calculate the empirical formula. If compound
contains an unknown element (X), briefly explain how you identified
which element it is.
2. Determine molecular formula for unknown compound and explain
answer.
3. Based on molecular formulary, calculate degree of saturation
present in unknown organic compound.
4. Clearly label molecular ion peak and base peak directly on the
mass spectrum and draw structures corresponding to these
icons.
5. identify at least...
can you pls help me identifiy the correct unknown ans explain why this is the know...
can you pls help me identifiy the correct unknown ans explain
why this is the know for the unknown its not 2phenylethanol.
halogens is absent, differntiate is absent , nitrogen test is
absent, sulfure is absent, Br2 is absent, kmno4 absent, ignition
test absent . 2,3 dnp contains ketone ,tollens no aldehdye absent
aldehyde , iodoform test contains carbonyl in it .
Melting point of solid ("C) (leave blank if liquid at RT): 57 degrees Celsius Boiling point of liquid...
Hi it's python I imported a data which are so many words in txt and I arranged and reshaped with ...
Hi it's python I imported a data which are so many words in txt
and I arranged and reshaped with alphabetically both rows and
columns
I was successful with these steps but I am stuck with next
step
below is my code and screenshot
import numpy as np
import pandas as pd
data=pd.read_csv("/Users/superman/Downloads/words_file2.txt",header=None)
df_input=pd.DataFrame(data)
df_output=pd.DataFrame(np.arange(676).reshape((26,26)),
index =
['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'],
columns =
['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'])
df_output.index.name="Start"
df_output.columns.name="End"
df_output
This below screen shot is what I have to find
I have to find each word...
33 On May 6, Jim Ryan borrowed $14,000 from Lane Bank at 7 % interest. Jim...
33 On May 6, Jim Ryan borrowed $14,000 from Lane Bank at 7 % interest. Jim plans to repay the loan on March 11. Assume the loan is on ordinary interest. How much will Jim repay on March 11? (Use Days in a year table) (Round your answer to the nearest cent.) Jm repay etbook 7-1 TABLE Exact days-in-a-year calendar (excluding leap year)" Day of month 30 31 30 31 28 31 30 31 31 30 31 31 Dec Mar...
Show the fragmentation pattern of the following. 1. 3-Phenyl-2-propenal (C9H80) with MW = 132.16 51 77 103132 relative intensity +0 mass/charge (m/z) 2. 4-Heptanone (C7H140) with MW = 114.19 + + relative abundance + 114 + +0 mass/charge (m/z)
The
compound is dibenzalacetone
MS 100 - MS-NW-6013 Relative Intensity 20 40 60 80 160 180 200 220 240 100 120 140 m/z Peak data 1) (%BP) m/z m/z 50.0 51. 01 76.0 77.0 78.0 89.0 91.0 102.0 103.0 104.0 115,0 5.7 18.1 5.4 48.7 5.5 5.1 26.6 13.0 61.6 9.5 5.8 129.0 131.0 132.0 156.0 157.0 191.0 205. 01 206.0 233.0 234.0 235.0 (a) (%BP) 7.3 42.7 $4.8 10.3 4.1 9.0 15.3 8.4 68.6 100.0 18.1 Report only the...
2. Draw the structure of the cation responsible for the base
peak (m/z=58) in the mass spectrum of 3-aminopentane shown
below:
3. Below is given the mass spectrum of a simple alkane. What is
the chemical formula of the alkane? What is the name of the alkane?
Explain how you determined the exact structure of the alkane from
the observed fragments.
4. Below is a mass spectrum of an ester. Identify the ester.
Consider that the dominant fragmentation pathway involves...
18. The mass spectrum of 2-methylpentan-3-ol is shown below. Draw the structure of the fragment ions of m/z= 73 and 59. Relative abundance (%) TTT 10 20 80 80 100 120 mi
CH3 Cl 100 Base 10) The El-MS of 2-chloro-2- methylpropane is shown at right. Draw the structure of the cation corresponding to the base peak. Clearly indicate where the charge resides. You need only show one of the two resonance forms. MS-NW-1505 no parent ion detected 92- Relative Intensity 10 15 20 25 30 35 40 55 60 65 70 75 80 45 50 m/z The 3:1 ratio of peak intensities at 77 and 79 m/z in the El-MS above...
Determination of Molecular Structure from molecular
formula, mass, IR, and Mass Spec data.
Molecular Weight: 134.22
Molecular Formula: C10H14
I need help finding the structure.
IR Data (3300-2650 Range):
*No peaks between 2650 and 2100*
IR Data (2100-600 Range):
MS Data (Two different views):
MS Peaks Labeled:
Transmittance 60 80 100 3250 43088.1; 95. +3060.1; 93.5 -3022.9; 93.9 2961.4; 64.843 3200 3150 3100 3050 3000 Wavenumber (cm-1) 2950 TTTTTTTTTTTTTIIIIIITTTTTTTTTTTTTTTTTTTTTTTTTTT 29002850 2800 2750 2700 2650 2903.6; 86.663 2866.3; 86.398 20... 40...
1. Based on the elemental analysis for the unknown
organic compound, calculate the empirical formula. If compound
contains an unknown element (X), briefly explain how you identified
which element it is.
2. Determine molecular formula for unknown compound and explain
answer.
3. Based on molecular formulary, calculate degree of saturation
present in unknown organic compound.
4. Clearly label molecular ion peak and base peak directly on the
mass spectrum and draw structures corresponding to these
icons.
5. identify at least...
can you pls help me identifiy the correct unknown ans explain
why this is the know for the unknown its not 2phenylethanol.
halogens is absent, differntiate is absent , nitrogen test is
absent, sulfure is absent, Br2 is absent, kmno4 absent, ignition
test absent . 2,3 dnp contains ketone ,tollens no aldehdye absent
aldehyde , iodoform test contains carbonyl in it .
Melting point of solid ("C) (leave blank if liquid at RT): 57 degrees Celsius Boiling point of liquid...
Hi it's python I imported a data which are so many words in txt
and I arranged and reshaped with alphabetically both rows and
columns
I was successful with these steps but I am stuck with next
step
below is my code and screenshot
import numpy as np
import pandas as pd
data=pd.read_csv("/Users/superman/Downloads/words_file2.txt",header=None)
df_input=pd.DataFrame(data)
df_output=pd.DataFrame(np.arange(676).reshape((26,26)),
index =
['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'],
columns =
['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'])
df_output.index.name="Start"
df_output.columns.name="End"
df_output
This below screen shot is what I have to find
I have to find each word...
33 On May 6, Jim Ryan borrowed $14,000 from Lane Bank at 7 % interest. Jim plans to repay the loan on March 11. Assume the loan is on ordinary interest. How much will Jim repay on March 11? (Use Days in a year table) (Round your answer to the nearest cent.) Jm repay etbook 7-1 TABLE Exact days-in-a-year calendar (excluding leap year)" Day of month 30 31 30 31 28 31 30 31 31 30 31 31 Dec Mar...
Most questions answered within 3 hours.
-
Write a command line to view the long listing of all files,
including hidden files, with...
asked 1 minute ago -
Predict the reactions, if any, when the
following hydrogen compounds are added to water, and
explain...
asked 1 minute ago -
What is the expression for the uncertainty in the total energy
Etot of equation?
Assume an...
asked 4 minutes ago -
In response to the increasing weight of airline passengers, the
Federal Aviation Administration told airlines to...
asked 4 minutes ago -
Events A and B are independent. Suppose event A occurs with
probability 0.63 and event B...
asked 14 minutes ago -
Rubies are essentially alumina Al2O3 with a contaminant of
chromium in the form of Cr2O3. A...
asked 22 minutes ago -
Write a full program that will accept
exactly three command line arguments
that can be interpreted as...
asked 24 minutes ago -
1.histones are proteins that make up nucleosomes. they bind to
the backbone of DNA in chromosomes....
asked 33 minutes ago -
What is the relationship between a variables value and their
probabilities as it is summarized by...
asked 41 minutes ago -
Balance Sheet
DR
CR
Cash
10000
AR
7000
Supplies
500
Equipment
5,000
Accum depreciation
...
asked 39 minutes ago -
Country
Continent
GDP (millions of US$)
Afghanistan
Asia
 
asked 42 minutes ago -
1) Use the Euclidean algorithm (write in pseudocode) to find the
greatest common divisor of 8...
asked 1 hour ago