Question 26 (2 points) Saved Which of the following ions is aromatic? D:0 = I II...
Question 47 (2 points) Which one of the following compounds is aromatic? S - II IV a) III Ob) Oc) II O d) IV Question 48 (2 points) Predict the product(s) for the following reaction: NaNH2, NH3 NH2 -NH₂ que "NH2 a) I, II and III b) I and II c) III and I d) II and III
Question 15 (2 points) Which of the following are possible products of the reaction shown? hv NBS Br Br IV Oa) I, II and III ob) I and II Oc) I, II, III and IV od) 1, III and IV Question 16 (2 points) Guess the structure of the compound using your understanding of chemical shifts. 2H PP انه IV oa) III ob) 1 oc) IV od) 11
Question 1 (2 points) Which one of the following compounds is aromatic? IV O a) 1 Ob) III Oc) IV O d) 11 Question 2 (2 points) Which structure shown below represents (Z)-3,5-dichloro-3- hexen-1-yne? CI IV 11 TIT O a) Ob) III Oc) 11 Od) IV
Question 19 (2 points) Which of the following compounds will undergo the fastest SN 1 reaction? Br BI Br Br 1 I! II! IV oa) III ob) IV OC) 11 od) 1 Question 20 (2 points) In the molecule shown below, determine which of the highlighted C-H bonds a to d is expected to have the lowest bond dissociation energy? HU Hd Oa) C-Hb ob) C-HC Oc) C-Hd od) C-Ha
Question 27 (2 points) Saved Which of the following substituents will not direct the incoming group to the ortho/para position during electrophilic aromatic substitution? Oa) -OCOCH3 Ob) -COOCH3 Oc) -CH2CH3 Od) -N(CH3)2 Question 28 (2 points) Saved Provide the reagents necessary to carry out the following conversion. OH OH Br Br Br Oa) Br2, hn Ob) HBr (3 moles) O c) Br2, FeBr3 o d) Br2
Question 11 (2 points) Rank absorption of the indicated bonds in decreasing (highest to lowest) order of IR frequency H II Oa) III>II>I ob) >I>III Oc) III>I>11 od) 1>II>III Question 12 (2 points) Which of the indicated protons in the following compound would appear most downfield in the 'H NMR spectrum? IV Oa) IV ob) 11 Oc) od) III
Question 47 (2 points) Which of the following carbocations is (are) likely to undergo rearrangement through a methyl shift? нус CH HC CH нус CH oa) both II and III ob) oc) 11 od) both I and II Question 48 (2 points) For the reaction shown, select the expected major organic product. 1. 1 e HCI 2 1 e HBO Ho Br + enantiomer + enantiomer + enantiomer + enantiomer IV 11 HI! Oa) 1 ob) 11 Oc) III od)...
Question 7 (2 points) A compound with a molecular formula of C10H1202 has the following TH NMR spectrum. Which of the following structures is consistent with this spectrum? OCH CH.CH CH,CH.CH 1 OOH OH CH,CH,CH, CH2CH.CH IV Oa) III Ob) IV Oc) 11 od) Question 8 (2 points) Predict the product(s) for the following reaction: NH, 14H NH $ NH2 Oa) I and II ob) I, II and III Oc) III and I od) II and III
Question 31 (2 points) What are the expected major products of the reaction sequence shown below? 1. O 2. H70 OH o OH 11 III IV v Oa) I and IV ob) I and II oc) I, III and IV od) II, III and IV Question 32 (2 points) Which one of the following dienophiles is least reactive in the Diels-Alder reaction? NO, phony HCO 11 IV Oa) III ob) IV Oc) 1 od) 11
Question 15 (2 points) Which of the following substituents will not direct the incoming group to the ortho/para position during electrophilic aromatic substitution? Oa) -CH2CH3 Ob) -OCOCH3 OC) -COOCH3 Od) -N(CH3)2 Question 16 (2 points) Which of the following compounds will undergo the fastest SN 1 reaction? Br Br Br Br IV a) 1 Ob) III OC) IV Od) 11