![]() ![]() CH3CH2CO2- K+ + CH3CH2CH2 CH2CO2- K+ Describe a sequence of reactions by which racemic 2,3-dibromobutane can be straightforwardly prepared from Describe the major organic product(s) of this reaction.Į) CH3C≡CD + CH3D CH3C≡CD + CH4 41) _ is produced when 1 equivalent of HBr is added to hex-1-yne in the presence of peroxides.ĭ) A mixture of E and Z isomers of 1-bromohex-1-eneĮ) E-2-Bromohex-2-ene A mixture of E and Z isomers of 1-bromohex-1-ene 42) Which of the alkyne addition reactions below involve(s) an enol intermediate?Į) none of the above both A and B 58) How many moles of oxygen are required in the complete combustion of 1 mole of acetylene?Į) 3 2.5 60) How many distinct alkynes exist with a molecular formula of C4H6?Į) 4 2 61) How many distinct alkynes exist with a molecular formula of C4H8?Į) 4 0 63) Which of the following reagents should be used to convert hex-3-yne to (E)-hex-3-ene?Į) HgSO4, H2O Na, NH3 64) Which of the following reagents should be used to convert hex-3-yne to (Z)-hex-3-ene?Į) HgSO4, H2O H2, Lindlar's catalyst 66) Which of the following reagents should be used to convert an internal alkyne to an α-diketone?Į) HgSO4, H2SO4 KMnO4, H2O, neutral 80) What is the major organic product that results when 3-heptyne is hydrogenated in the presence of Lindlar's catalyst?Į) heptane (Z)-3-heptene 81) What is the major organic product that results when 3-heptyne is subjected to excess hydrogen and a platinum catalyst?Į) heptane heptane 82) What is the major organic product that results when 3-heptyne is treated with sodium metal in ammonia?Į) heptane (E)-3-heptene 83) What is the major organic product that results when 1-heptyne is treated with 2 equivalents of HBr?Į) 1,1-dibromoheptane 2,2-dibromoheptane 84) What class of organic product results when 1-heptyne is treated with a mixture of mercuric acetate in aqueous sulfuric acid?Į) carboxylic acid Ketone 85) What class of organic product results when 1-heptyne is reacted with disiamylborane followed by treatment with basic hydrogen peroxide?Į) carboxylic acid aldehyde 88) The correct IUPAC name for the following structure is _.ĭ) (Z) 4-isopropyl-3-hepten-5-yne (E) 4-isopropyl-4-hepten-2-yne 89) What is the correct IUPAC name for the following compound?ĭ) 5-bromo-4-ethynyl-1-heptene 3-(1-bromopropyl)-5-hexen-1-yne 90) Which of the following bases are sufficiently strong to deprotonate a terminal alkyne with an equilibrium constant greater than 1?Ģ) lithium diisopropyl amide 4) phenylmagnesium bromideĮ) 1, 2, 3 and 4 2, 3 and 4 92) Complete the transformation below by indicating the necessary sequence of reagents.ī) 1) D2 / Pd, BaSO4, quinoline 2) Br2 / H2OĮ) 1) Br2 / H2O 2) D2 / Pd, BaSO4, quinoline 1) D2 / Pd, BaSO4, quinoline 2) Br2 / H2O Draw the products which result when oct- 3-yne is heated in basic potassium permanganate solution. After this time, an excess of D2O was added. ![]() 38) Among the compounds water, but-1-yne, but-2-yne, and ethane, which are stronger acids than ammonia?ĭ) but-1-yne and but-2-yne water and but-1-yne 39) To a solution of propyne in diethyl ether, one molar equivalent of CH3Li was added and the resulting mixture was stirred for 0.5 hour.
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