Question

i have here question 14 and 15 answered but i dont know how to explain them in question 16 and 17

14. Propose a structure for the compound C13H100, with the following 'H NMR and 'SC NMR spectral data 200 180 160 140 120 100 60 Benzophenone

Answer 1

8.16 4 THA OMMA (Benzophenone) 1H NMR signals HA = 7.790 ppm HB - 7.46 ppm He = 7.57 ppm 13 C NMR signals; Cs = 4195 ppm C1 = 4 140 PPM C2:4155 ppm Con 125 ppm CAM 131 ppm Cdiphenylmethanol 1 H NMR signals HA = 7.49 to 7.15 ppm HB = 45.8 ppm Hc 242.3 ppon 13C NMR signals Som145 ppm 12:4126 ppm 3 - 4128 ppm C4 = 4127 ppm -> U we can monitor the deaction, using 1H and 3C NMR spectoscopy. 20 1F ce take some aliquot of the deaction mixtuac and dun IH NMR spectro the following obsearation to be noted J Appearance of peak at us.8 and 2-3 ppm with high intensity strong peak) indicates reaction is complete i No appearance of peak at us.8 and :3 ppm the deaction is note takeplace. appearance of peak at n5.8 ppm and 42:3 ppm cuoith loco intensity (Weak peak) indicates acon is incomplet similarly, disappearance of peak at 4195 ppm and appearance of peak at 75 ppm indicoles deaction to be completed

Q-17; 33 NMR spectroscopy is the best to distinguish product and geactant UV-Visible Spectroscopy is not a suitable method TE Shows only the extended conjugation be deactant and product CAS it pzesen product CAS it present in both deactant and poroduct Value mesin be slightly changed 2 IR spectroscopy gives the info Froscopy gives the information Of Functionar group present but do not specify its position in benzophenone the peak at n. 1700 cm! due to-B- Stretching Frequency bhich disappear in product and nece peak ok u 3300- 3400 cm duetoo-H group appeaos indicates deaction to be takeplace 3 NMR ( 14 and 130) gives information about functional group and also its position r explained in previous question)
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