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.
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Draw dibenzalacetone structure with fragmentation evidence 1. M/Z of 235, 234, 233, 157, 131, 115, 103, 77, 51 2. the %...
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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
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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"
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2. Draw the structure of the cation responsible for the base
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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
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4. Below is a mass spectrum of an ester. Identify the ester.
Consider that the dominant fragmentation pathway involves...
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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:
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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
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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
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test absent . 2,3 dnp contains ketone ,tollens no aldehdye absent
aldehyde , iodoform test contains carbonyl in it .
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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"
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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...
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