209 Electromagnetic radiatin inth, gionisused in lH NMR spectroscopy. 0) ultravi

Question

209 Electromagnetic radiatin inth, gionisused in lH NMR spectroscopy. 0) ultraviolet E) X-ray 21) It a molecule contains 4 elements of 70 and 80 ppm, what structural group is lbely to be present? 8) a carbon-carbon triple bond O) a carbonyl group D) a hydroxyl growp E) a cyclohesyl ring Predict the number of signals espected (disneganding spliing) in the TH NMR spectr of 22) CH, llow many unique NMR signals (disregard splitting) would be prneed ite lH sprdumof following compound 7 A) 2 B) 3 D) 5 E) 6 F7 24) Predict the number of signals expected, their splitting, and their relative area in the TH NMR spectrum of CH3CH2OCH3 25) Compound I has a molecular formula of CH16 In 13C NMR, compound I gave 3 peaks 25) and in 1H NMR it also gave 3 peaks, a doublet, a triplet and a multiplet. Provide a structure for compound L 26) 26) The Diels-Alder reaction is a concerted reactionc this mears A) a mixture of endo and exo products are formed B) all bond making and bond breaking occurs simultaneously C) the products contain rings D) the reaction is highly endothermic E) the reaction follows Markovnikov's rule.

Explanation / Answer

20) Electromagnetci radiation in radio wave region is used in 1H NMR spectroscopy.
   Option B is the right answer

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