What is the best choice for the preparation of tert-butylmethyl ether shown below? CH; HC-º-0-CH; CH...
Which attacking species shown below would be the best choice to enforce an E2 pathway over an SN2 pathway for the reaction below? Attacking Species? BI CH; H -¢-o CH,MgB HC-0-0 CH; (a) H (b) (c) NH OH (d) SH (1) e Which solvent(s) listed below would be satisfactory in Sn2 reactions? HzC CH DMSO CH3CH,OH o HzC. Н.С DMF I II III a. I only b. II only c. III only d. I and II e. I and III...
What is the best route for converting the alcohol to the ether as shown below using a substitution reaction or a sequence of substitution reactions while preserving the steroochemistry at the chiral center? OH OCH a. NaOCHy b.i. PC13; ii. NaOCH ci.HCI; N.CH OH 4. CH3OH Oei. HCI; il NOCH f. LICH3 What reagents is the best choice for achieving the following chemical transformation? 0 ?? no CH; CC1z O a. PC13 b. Cl2, NaOH c. NaCl, H20 Ed. Cl2...
What is the best choice of reagent to achieve the following reaction? Br HC, -CH₃ Hac. -CH3 ? a. NaBr b. HBr. H2O C. Br2 O d. NBS, heat
11. Choose the best reagent for carrying out the following reactions from the list below. Place the letter of the reagent(s) in the box over the reaction arrow. Use only one letter per box. (5 points) CH: OH Cºca C ОТН: A. NaH, then CH31 B. NaOCH3, CH3OH C. m-CICH4CO3H D. CH3MgBr in ether, then H30+ E. warm H2SO4/H20 F. Hg(O2CCF3)2, CH3OH G. H2/Pd H. PCC, CH2Cl2 I. Cl2, H2O J. LiAlH4 in ether, then H3O+
Which attacking species shown below would be the best choice to enforce an E2 pathway over an Sp2 pathway for the reaction below? Attacking Species? Br H CH,MpBr HC-0 NH (a) H (b) e OH H₂C_&_• SH Els (d) (1)
28) The reaction of tert-butyl bromide, (CH,)CBr, with ethanol affords the substitution product tert-butyl ethyl ether, (CH)1COCH CH, in acidic conditions. What would happen to the rate of the reaction if the concentration of ethanol was doubled? A) The rate remains the same. B) The rate decreases by a factor of 2 C) The rate increases by a factor of 2. D) The rate increases by a factor of 4. Circle the following alkyl halide that will undergo the fastest...
Which of the following shown below represent a pair of enantiomers? CN (a) Br HAC-C-CN (b) CO2H HC-Br HC-CH? Br HC-CN CO2H (c) (d) CO2H CH3 он H -OH HC-CH2CH3 CH3CH H3C CH3 -CO2H H H2N H3C CH H2N 2 o
Which option (A,B,C, or D) is the best way to synthesize the ether shown? Figure 8.8 x or A. X Br + o CH₂ CH3 - B. X or + Br Chtechts - c. X oH + - o Ctzeltz - D. t Br+ Br CH₂ CH3 →
Which of the following shown below represent a pair of enantiomers? Which of the following shown below represent a pair of enantiomers? (a) Br CN CC-CN HC-CH3 (b) ÇO2H Br HC-Br HC-CN CO2H Br CN Ich CH3 OH OH (d) CH3 CO2H H-C-OH HC-CH2CH3 CH2CH2 H3C 1. H7C-CO2H HAN H3C 77-H HN. O ཅི O ཆེ O O བྱི
Question 10 What reagents is the best choice for achieving the following chemical transformation? O 0 ?? CH CC1; a. Cl2, NaOH b. PC13 Ос. HCI, А d. NaCl, H20 e. Cl2, AcOH Of. Cl2 Question 11 Which attacking species shown below would be the best choice to enforce an E2 pathway over an Sp2 pathway for the reaction below? Attacking Species? Br H CH CH3MBI HCO HC O H (b) CH NH OH (a) SH ( a. a Сь....