Question 1 (2 points) Which one of the following compounds is aromatic? IV O a) 1...
Question 25 (2 points) What is the stereochemistry around carbon 2 and 4 respectively? H.CO H сосн. 4 21 CONH, OH CHE a) E, E Ob) E, Z Oc) Z, E O d) z, z Question 26 (2 points) Which structure shown below represents (Z)-3,5-dichloro-3-hexen-1-yne? CI CI CI IV II III Oa) Ob) IV O 11 O d) III
Question 49 (2 points) Which structure shown below represents (2)-3,5-dichloro-3-hexen-1-yne? cl III CI TV a) Oь) І Oc) IV d) II Question 50 (2 points) A triple bond is composed of a) Three sigma bonds b) Three pi bonds c) One sigma and two pi bonds d) Two sigma and one pi bond Previous Page Page 2
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 26 (2 points) Saved Which of the following ions is aromatic? D:0 = I II IV OA) OB) 11 OC) III OD) IV Question 27 (2 points) Saved Which of the following ions is aromatic? 20: A) Only II and III OB) Only III and IV OC) Only I and II OD) Only II and 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 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
Question 45 (2 points) For which of the following compounds will the M+2 peak intensity be equal to the intensity of the molecular ion peak M? oa) CH3CH2CH2NH2 ob) CH3CH2CH2Br OC) CH3CH2CH2C1 od) CH3CH2CH2OH Question 46 (2 points) Predict the major product(s) of the following reaction. Br2 light Ar o Br CHB CH-Br CHUB Br III IV Br Oa) IV Ob) III OC) 11 od) 1
Question 41 (2 points) Which of the following carbocations is (are) likely to undergo rearrangement through a methyl shift? H2C CH3 H3C CH3 H3C CH3 III a) both II and III Ob) both I and II Oc) Od) Question 42 (2 points) For the reaction shown, select the expected major organic product. 1. 1 eq HCI 2. 1 eq HBr Br. CI -Br -CI Ha CI Br + enantiomer + enantiomer + enantiomer CI Br + enantiomer IV 11 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 3 (2 points) For the reaction shown, select the expected major organic product. 1. 1 eq HCI 2. 1 eq HBO Br -Br Br + enantiomer + enantiomer + enantiomer Br + enantiomer IV II a) 11 Ob) III O c) v Od) I Question 8 (2 points) What is the product of the reaction below? ТОН PCC O OH I II OH III IV a) 1 b) IV O c) III d) I Question 10 (2 points) Predict...