option b is correct
Isovaleraldehyde (shown above), analyzed in the previous spectrum, fragments to form a cation with a m/z=71....
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...
Given the parent compound, draw the mass spectrum fragment that
is observed at m/z 71. Include any hydrogen atoms and the
charge.
Given the parent compound, draw the mass spectrum fragment that is observed at m/z 71. Include any hydrogen atoms and the charge.
The mass spectrum of isopropyl ether is shown below. Draw the radical cation giving the molecular ion. Be sure to include the nonbonding electrons on the oxygen. Identify the fragment giving rise to the peak at m/z = 87. Be sure to include the nonbonding electrons on the oxygen.
CHM 2845 (FA19) 5. The MS spectrum of a compound with formular C,H,O is shown below, Let's analyze it and deduce the structure step by step. (2 pts) MASS SPECTRUM 100 13 a. The element of unsaturation is 5 U : 209+2 - ID b. The peak at m/z=91 (combined with the EU above) strongly suggests a fragment. 134 c. The base peak at m/z-43 suggests two possibilities: and_ d. Finally the predicted structure must satisfy the EU 0.01 de...
Name: Starting with the mass spectrum of n-heptane What is the molecular ion? What fragment is lost to generate the ion with m/z =71? What cation does the peak at m/z = 43 represent? What group does the spacing between each set of ions represent? Why is the peak at (M-15), corresponding to loss of -CH3 so small? Draw the structure of 2,4-dimethylpentane What is the structure of the ion responsible for m/z = 85? Relative Intensity What is the...
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
zene, C6H6? 12-23 Propose structures for compounds that fit the following data: al A ketone with M+ 86 and fragments at m/z 71 and m/z 43 h An alcohol with M+ = 88 and fragments at m/z 73, m/z 70, and m/z = 59 12-24 2-Methylpentane (C6H14) has the mass spectrum shown. Which peak represents M+? Which is the base peak? Propose structures for frag- ment ions of m/z 71, 57, 43, and 29. Why does the base peak have...
Predict the structure
×
Mass Spectrum (not shown): [M] = 193 (100%)m/z IR Spectrum (not shown): 3300 (m), 3200 (m) 3060, 2985, 1725, 1600, 1495 cm otherwise indicated) (all listed are strong (s) unless 'H NMR Spectrum (400 MHz, CDCI, 25 °C) d (J-8 Hz) d (J-2 Hz) dd (J-8,2 Hz) m PPM HH 2H 3 NMR Spectrum (with DEPT), proton-decoupled (125 MHz, CDCI, 25 °C) H 6H (C) (C) (C) (CH) (C) (2xCH) i 180 ' 140 ' 120...
Which compound produced the EI mass spectrum shown below?
Write the MS data for this compound (including the fragment at m/z
= 127) in the format required for lab reports.
Which compound produced the El mass spectrum shown below? sau Write the MS data for this compound (including the fragment at m/z = 127) in the format required for lab reports
Shown above is the 1H-NMR spectrum of a compound with
the formula C5H10O2 . Choose from the constitutional isomers below
to assign a structure to this spectrum.
3H 2H 3H 2H PPM Shown above is the 'H-NMR spectrum of a compound with the formula C5Hi002. Choose from the constitutional isomers below to assign a structure to this spectrum a b C CH3CH2CH2CH2COH CH3CH2COCH2CH3 CH3CH2CH2COCH3 (Choose the letter corresponding to the correct structure from the drop-down list provided.) Correct Structure: Assign...