3/26/2020 Name! 1. Which of the m/z values correspond to the molecular ion for the following...
79. Which of the m/z values correspond to the molecular ion for the following compound? OH A) 18 B) 82 100 0 102 E) 103
Assign a base peak, molecular ion peak (with m/z) and identify the structure. 100- MS-N-0025 Relative Intensity 10 2030 70 80 90 m /z rse Cha O a OOTW
a) Describe the difference between the base peak and the parent ion (or molecular ion) peak. b) Identify the base peak and the parent ion (or molecular ion) peak (if any) according to the mass spectrum. c) Identify the mass fragments which correspond to m/z = 77, 105, 111, and 139. d) Identify and give explanations for the magnitude (or intensity) of the peaks at m/z = 113, 141, and 218. Mass Spectrum ofp-C hlorobenzophenone 105 100 80 139 CI...
Question 5 (2 points) For which of the following compounds will the M+2 peak intensity be equal to the intensity of the molecular ion peak M? a) CH3CH2CH OH 0 b) CHỊCH CHANH, Oc) CH3CH2CH_Br d) CH,CH2CH2C1 Question 6 (2 points) What is the product of the reaction below? "OH PCC o OH O OH TV a) Obiy c)
1. An unknown hydrocarbon has a molecular ion peak at m/z 84 with a relative intensity of 31.3. The M+1 peak has a relative intensity of 2.06 and the M+2 peak has a relative intensity of 0.08. What is the possible molecular formula of the compound?
Which of the following compounds is consistent with an M** peak at 73 m/z ratio? a. CH3CH2CH(CH3)2 b. CH3CH(OH)CH2CH3 C. CH3CH2OCH2CH3 d. CH3(CH2)3NH2
Circle the molecular ion peak for the following MS spectrum and the m/z value for the molecular ion is _____________ 4. Circle the molecular ion peak for the following MS spectrum and the m/z value for the molecular ion is 42 pt) 100 80- 60- ? 40- 20- 10 20 30 40 50 m z
Which of the following m/z fragments will be the molecular ion peak of the analyte pictured below? 85 176 91 43
17) Which of the following ions gives a peak in the mass spectrum of 1-butanol? A) o CH3CH2CH=CHA B) CH3CH2CH=CH: C) CH, CH2CH=CHE D) CH3CH2CH=CHE E) none of the above
Propose three reasonable molecular formulas for a molecular ion at m/z = 176, (show calculations; 3 pts) Propose two reasonable structures for a hydrocarbon having an exact mass of 122.1096 that forms 1-ethyl-1-methylcyclohexane upon hydrogenation with excess H2 and Pd-C. (2 pts) 3. 4. A low resolution mass spectrum of a neurotransmitter gave a molecular ion at m/z s 153. Three possible formulas for this molecular ion are Coth/N,O2. Cat,NO, and C,HnN,O. A high resolution mass spectrum provided a exact...