+4 OD) +3 Question 25 (2 points) What is the chemical formula for the following Lewis...
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 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 1 (10 points) Which molecules at least one polar bond? OA (CF) OB(CH,O) Oc(N,0) OD (NH3) DE(CHCI3) OF(NO2) Question 2 (10 points) Which molecules have a partial negative charge on a nitrogen atom? OA (CF) DB (CHO) Oc(N2O) OD (NH3) OE (CHC13) OF(NO2) Question 3 (10 points) . I 1 1 lo . o Which molecules shown are polar? OA (CF) CB (CHO) Oc(N₂O) Do(NH3) JE (CHC13) OF (NO₂)
Question 29 (2 points) Saved How would you use 'H NMR spectroscopy to distinguish between the following compounds based on the benzene ring protons? II C O a) Benzene protons for I and II both show up between 7.0 - 8.0 ppm Ob) Benzene protons for I show up between 6.0 - 7.0 ppm and Il between 7.0 - 8.0 ppm OC) Benzene protons for I show up between 7.0 - 8.0 ppm and Il between 6.0 - 7.0 ppm...
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 1 (10 points) Which molecules at least one polar bond? OA (CF4) OB(CH20) Oc(N2O) OD (NH3) OE (CHC13) OF(NO2) Question 2 (10.
Question 29 (2 points) How would you use H NMR spectroscopy to distinguish between the following compounds based on the benzene ring protons? obor Oa) Benzene protons for I and II both show up between 7.0 - 8.0 ppm ob) Benzene protons for I show up between 6.0 – 7.0 ppm and Il between 7.0 - 8.0 ppm Oc) Benzene protons for I show up between 7.0 – 8.0 ppm and II between 6.0 - 7.0 ppm od) Benzene protons...
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 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 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