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- When measured on a spectrometer operating at 200 MHz, chloroform (CHCl3) shows a single sharp absorption at 7.3 δ. (a) How many parts per million downfield from TMS does chloroform absorb? (b) How many hertz downfield from TMS would chloroform absorb if the measurement were carried out on a spectrometer operating at 360 MHz? (c) What would be the position of the chloroform absorption in δ units when measured on a 360 MHz spectrometer?For each compound, assign likely structures to the fragments at each m/z value, and explain how each fragment is formed.a. C6H5CH2CH2OH: peaks at m/z = 104, 91b. CH2 = C(CH3)CH2CH2OH: peaks at m/z = 71, 68, 41, 31Account for the formation of the base peaks in these mass spectra. Q.) Isobutylmethylamine, m/z 44
- Which amomg the fragments below will be dectected by mass Spectrophotometer? [CH3CH3]+ CH3CH3 •CH2CH3 [CH3CH4]- only ii i and iii only i ii and iv only iiCalculate the IHD of C7H6XNO and identify the important peaks in the following MS spectral data and draw the structure of the important peaks in the following MS spectral data.Which amomg the fragments below will be dectected by mass Spectrophotometer? [CH3CH3]+ CH3CH3 •CH2CH3 [CH3CH4]- i and iii only ii ii and iv only i only ii
- 2,3-Dimethylbutane and 2,2-dimethylbutane have the same molecular ion in the mass spectrum, but only one of these isomers gives a significant fragment at m/z = 57. (a) Which isomer shows an intense peak at m/z = 57? (b) Propose a structure for the ion that gives rise to this peak. (c) The base peak in the mass spectrum of the other isomer occurs at m/z = 43. What ion gives rise to this peak?What best describes the IR spectrum of NaCl? A broad peak at 3400 cm-1 A strong peak at 1700 cm-1 No peaks are observed A weak peak just above 3000 cm-1What are the functional groups in Camphor and Isoborneol? What peaks show up in their respective IR spectrum + wavenumber (cm-1)
- A molecule produces an IR spectrum with key peaks at approximately 3300 and 2100 cm⁻¹. The mass spectrum has a molecular ion with a m/z = 68, and major fragment with m/z of 39. Draw a structure that best fits this data.The mass spectrum of 2,3-dimethylpentane [(CH3)2CHCH(CH3)CH2CH3]shows fragments at m/z = 85 and 71. Propose possible structures for theions that give rise to these peaks.Draw the structure of the important peaks in the mass spectrum of C9H8O (unsaturation = 6) Major Peaks: m/z = 132, 103, 77, 53