Consider the fragmentation pattern below. Which of the following could be the molecule that generated the given mass spectrum? + 100- 8 8 Relative Intensity 40 20 10 20 A) C6H6 B) CH₂Cl2 30 C) CH3Br D) C7H8 E) CH4 40 m/z 60 70 8. 90

Ater analyzing a mass spectrum you conclude that the molecule being analyzed has the molecular formula C4H8; however, there are five possible constitutional isomers with that same molecular formula. the only thing that stands out in the mass spectrum is a strong fragment signal at m/z=41. Determine the possible constitutional isomers for C4H8 and explain which isomer matches the mass spectrum.

An example of the fragmentation mechanism of a mass spectrum is as follows: :0 H3C H₂C + CH3 H₂C CH3 H₂C M*72 m/z 57 to: H₂C. H₂C CH3 M*72 H₂C m/z 15 =0+ *CH₂CH3 m/z29 m/z 43

10. The mass spectrum of a C, H, O containing compound is shown below. Use the Rule of 13 to determine a molecular formula and use the formula to calculate units of unsaturation. Employ the fragmentation pattern to propose a structure. MS-NJ-5506 80 20 10 20 30 40 50 60 70 80 90 100 110 120 m/z Relative Intensity

C13 HNMR Spectroscopy, please solve this problem and explain it.

The El mass spectrum of an unknown compound is given below. Interpret the spectrum and identify the structure of the compound from the characteristic fragments. 94 M+ = 122 65 107 51 77 100 120 130 40 110 m/z

In the mass spectra below, determine the Base Peak, the molecular ion peak and indicate the fragmentation process of ions marked with their respective value. 100 Mass Spectrum 57 80 29 60 87 40 101 M** 73 20 130 Cg H180 40 80 120 160 200 240 280 m/e yeed eseq p %

Please refer to the image below

Given the MS spectra below, show the fragmentation pattern responsible for m/z values Relative abundance 100 50 0 20 40 60 m/z 80 86 (M - CH₂)+ (CH3CH₂)3N M+• 101 100 120 P

In the mass spectra below, determine the Base Peak, the molecular ion peak and indicate the fragmentation process of ions marked with their respective value. 100 Mass Spectrum CH3 105 80 60 40 M 134 20 C3H100 40 80 120 160 200 240 280 m/e 100- 80 91 Mass Spectrum 60 134 40 20 149 C10 H15N 40 80 120 160 m/e 200 240 280 % of bese peak % of base peak