35. Answer is B ( C-Hb )
because after removing Hb , the formed intermediate would be most stable due to reasonance, so this bond have lowest bond dissociation energy.
36. Answer is D ( I )
It is a radical mechanism so a stable 3 degree radical will be formed , which would further lead to racemised product.
Question 35 (2 points) In the molecule shown below, determine which of the highlighted C-H bonds...
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 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 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? O a) CH3CH2CH2NH2 Ob) CH3CH2CH2Br Oc) CH3CH2CH2CI d) CH3CH2CH2OH Question 46 (2 points) Saved Predict the major product(s) of the following reaction. Br2 light te: Br Br CH,Br. ICH Br -CH2Br BI III IV Br O a) IV Ob) III Oc) 11 d) 1
Question 19 (2 points) The reaction of 1,3-butadiene with hydrogen halide at 40°C will undergo addition under control a) 1. 2; thermodynamic b) 1, 2; kinetic O c) 1,4; kinetic d) 1.4: theromodynamic Question 20 (2 points) In the molecule shown below, determine which of the highlighted C-H bonds a tod is expected to have the lowest bond dissociation energy? Ha HE Hс Hd a) C-Ha b) C-Hb DC-HC d) C-Hd Provloun Page
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 41 (2 points) Which of the following would you expect to function as the best radical genrator at the lowest temperature? IV Oa) II ob) III OC) IV od) Question 42 (2 points) Predict the major product for the following reaction. CHCI AC 1. KMnOd/-OH 2. Hy AICH OH Он о OH IV oa) 11 ob) III oc) IV od)
Question 5 (2 points) In the reaction below which of the following is true? HN Br2 FeBr3 O a) Br goes ortho/para to -OCH3 Ob) Br goes meta to -OCH3 O c) Br goes meta to -NHCOCH3 O d) Br goes ortho/para to -NHCOCH3 Question 6 (2 points) Predict the major product for the following reaction. HCI OOC CI CA 1 II 8.8 0 CI IV III O a) 11 Ob) 1 O c) III Od) IV
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 36 (2 points) Predict the major product(s) of the following reaction. Bra XX II Br CH2Br. CH,Br CH,BE Br IV Br a) Oь) и O civ d) I Question 37 (2 points) Identify one final major product in the following reaction sequence: CHCI AICI, CHNO c His Zn HCI CH &&9 NH NH NO, N a) II Ob) III OCI d) IV Question 38 (2 points) Predict the product(s) for the following reaction: a NH, Hạ NH NH TH...
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...