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- 1 (c) 2-Methyl-3-pentanol reacts with PCC to form compound F. (i) Draw the structure of F. (ii) In the mass spectrum, identify the m/z value of the molecular ion peak for compound F. (ii) Fragmentation of radical cation F exhibits two fragment ion peaks at m/z 57 and m/z 71. Propose the structures of these two fragments. (iv) Draw the resonance structure for each of the cation in (iii).The base peak in the mass spectrum of 2,2,5,5-tetramethylhexane (molecular mass = 142) is at m/z = 57, which corresponds to a composition of C4H9. Suggest a structure for the fragment that accounts for this peak and offer a reason for why this fragment is so abundant.The mass spectrum of 3-ethyl-3-methylheptane [(CH3CH2)2C(CH3)CH2CH2CH2CH3] shows fragments at m/z = 127, 113, and 85. Propose structures for the ions that give rise to these peaks
- Predict the masses and the structures of the most abundant fragments observed in the mass spectra of the following compounds. (a) cyclohexyl isopropyl ether (b) tert-butyl propyl aminePlease help me analyze this 1H and 13C Acetylferrocene NMR data. I am not sure how to read the peaks and what information they give.Predict the masses and the structures of the most abundant fragments observed in the mass spectra of the followingcompounds.(a) 2-methylpentane (b) 3-methylhex-2-ene (c) 4-methylpentan-2-ol(d) 2-methyl-1-phenylpropane
- (i) Give reasons, with reference to compound structures, for each of the following observations: (i) (ii) The chemical shift value for a hydrogen attached to a benzene ring is greater than 6.0 ppm while that of a hydrogen attached to an alkyne is c. 2.5 ppm. IR spectroscopy alone can clearly distinguish between trimethylamine and (iii) H-NMR clearly distinguishes between propanethiol and propanol. propanamine.Indicate two basic differences that exist between the spectra of 1H y 13C in NMR.13. (a) A compound with molecular formula С -HаО exhibited m/z 108, 93, 78, 77, Derive the most probable 65, 51. structure.
- Predict the masses and the structures of the most abundant fragments observed in the mass spectra of the following compounds. (a) acetophenone (b) 3-bromo-2-methylpentanePredict the masses and the structures of the most abundant fragments observed in the mass spectra of the following compounds. (a) 4-methylpentan-2-ol (b) 2-methyl-1-phenylpropaneii) How are the spectroscopic techniques useful in the structural elucidation of following organic molecules