Propose three reasonable molecular formulas for a molecular ion at m/z=152.
Propose three reasonable molecular formulas for a molecular ion at m/z=152.
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...
37. An alcohol has a molecular ion peak at m/z 102. What is a reasonable formula for the alcohol? (a) C3H 100, (c) C,HO b) CH2 (d) C,H,O 38. How many hydrogen atoms are on the indicated carbon? (a) nonc (b) one (c) two (d) three
propose a reasonable structure with 13cnmr 1hnmr and ir data
given
Molecule B The molecular ion is a weak peak at 130 m/2 'H NMR 300 MHz 1.30 1.31 1.35 1.871.94 Molecule B 200 180 160 140 120 80 60 100 ppm 40 20 NMR: 174.0, 64.0, 30.9. 27.7. 19.3, 13.7.9.1 ppm DEPT 90: none DEPT 135: +ve: 13.7,9.1-ve: 64.0, 30,9, 27.7.19.3
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
4. Propose a structure for a molecule whose mass spectrum shows a parent ion at m/z 100 with a base peak at m/z 43, an IR peak at 1720 cm' which gave the following 'H NMR spectrum. 33 N - PPM 5. Propose a structure for a molecule whose mass spectrum shows a parent ion at m/z 100 with a base peak at m/z 43, an IR peak at 1720 cm' which gave the following 'H NMR spectrum. doublet 2...
parent ion at m/z 102 (M*), IR peaks at 1740 and 1150 cm 10. Propose a structure for a molecule whose mass spectrum shows which gave the following 'H NMR spectrum.) 6 1 septet 2 5 0 6 PPM 11. Propose a structure for a molecule whose mass spectrum shows a parent ion at m/z 116 (M*) with at 1740 and 1150 cm1 which gave the following H NMR spectrum. base peak at m/z 43, IR peaks 6 1 2...
Propose a molecular formula for a compound that has one degree of unsaturation and a mass spectrum that displays a molecular ion signal at m/z = 86.
2-4. not partial please
Problem 3 An unknown substance shows a molècular ion peak at m/z= 170 with a relative intensity of 100. The M+ 1 peak has an intensity of 13.2, and the M+2 peak has an intensity of 1.00. What is the molecular formula of the unknown? Can you propose a structure? Problem 4: 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...
What would be the m/z ratio of the molecular ion (i.e, the parent ion from electron impact ionization) of 2,2-dimethylpropane? (Fill in an integer number)
need to fill the boxes
Label the molecular ion and base peaks on the mass spectrui Delu 100 レase peak ion 1020 3o 40 o 6O 70 B0 100 m/z What element does the analyte molecule likely contain? Propose one possible molecular formula for the analyte molecule. ELEMENT: POSSIBLE FORMULA: The mass spectrum of 2.2'-dibromobiphenyl is shown below, along with a proposed structure of the m/z 314 peak. Based on this information, propose structures for the other two peaks indicated....