4. Sketch and annotate the ¹9F and ³1P NMR spectra for the compound shown below. [Assume coupling occurs only through 3 bonds or fewer and that ¹H, ¹⁹F, and 31P are 1-1/2 and 100% abundant; all other nuclei are NMR inactive.] F3C PCI CI

1B. Can 1H NMR spectroscopy be used to differentiate between the two compounds? Briefly explain why or why not. Predict the 1H NMR spectrum for each compound (include integration, multiplicity, and approximate chemical shift). Put it in data table format.

Identify and draw the structure of the important peaks in the MS spectral data of C9H8O given below.

Based on the structure below. Indicate if it is possible to use U.V spectroscopy, if so, indicate which types of transitions are most likely to be expected for this compound, then classify them in increasing energy order. OH F. N. N. HC CH3

5. Mass spectra are provided for two constitutional isomers with the formula C10H14O. Predict the structures of each molecule. Label at least one fragment ion in each spectrum that helps elucidate its structure. Relative Intensity 120 100 80 60 20 0 120 100 80 60 40 10 20 ه 15 14 18718 19 26272829 27 29 i k 26 30 70 20 31 30 ..." 39 43 30 45 3638 40 42 44 4647 49 40 51 50 50 ܘܪܝܝܐ 00 | 830 کم میوه 2 کا 5758 60 60 65 70 78 79 777496 80 41 43 3940 6066264 | 3304 30000 142 | 40546 440*********** | 667 6807172784870700 88508780 363738 40 80 80 # m/z 90 m/z 89 91 90 93 94 98 100 . الی 100 105 10964 93 103 | 9495 9700 10002104080007 fois 110 110 117 115 118 113 119 120 120 132 131 133 12289 || 1395 130 121 1151617181920-122 126272829303132333435 130 140 140 14748 150 150 14485051 150 2

Which nucleus in the structure below will give rise to the splitting pattern shown? Ha Hb Но Coupling constants: 2Jab = 2 Hz; 3Jac = 18 Hz; 3Jbc = 10 Hz; 3JaF = 20 Hz; 3JbF = 50 Hz; 2JcF = 84 Hz. Select one alternative: Ha Hc

The absorption pattern in the UV/VIS region corresponds to (a) bond vibrations b) valance electron transitions =) molecular rotations E) nuclear spin 0000 a an IR spectrum

Can you explain spectroscopy? Let's start with NMR Spectroscopy. What is the difference between a proton being enantiotopic and homotopic? What does it mean for a proton to be shielded or deshielded? How do you determine J (the coupling constant)? What does 'coupling is mutual' mean? How is that translated on the NMS Spectroscopy spectrum? Does that have to do with the polarity of the molecule? Is there an easier way to explain that? When thinking about C-13 NRM Spectroscopy, what it meant by the statement, "the carbons cannot integrate"? When looking at an NMR Spectroscopy spectrum, how do you know which peak belongs to which proton? (The intensity of the peak and the ppm of the peak)   P.S. These questions come from after watching a lecture. There is no graded assignment attached to these questions. I simply do not understand the material.

How To Use MS and IR for Structure Determination ?

4. Sketch and annotate the ¹9F and 31P NMR spectra for the compound shown below. [Assume coupling occurs only through 3 bonds or fewer and that ¹H, ¹ºF, and 31P are 1-1/2 and 100% abundant; all other nuclei are NMR inactive.] F3C PCI CI