Just give correct answer. Don\'t need explain. thank ! 55. Epoxides derived from
ID: 698354 • Letter: J
Question
Just give correct answer. Don't need explain. thank !
55. Epoxides derived from vegetables oils present an 60. Which statement cat. H SO alternative to petroleum-derived epoxides as cross- linking agents, plasticizers, and polymer stabilizers Which structural fragment of vegetable oils makes them crude materials for the synthesis of epoxides? concerning this reaction is true? (A) The product is achiral. (B) The product is a racemic mixture (C) The product is a single enantiomer (D) The product is chiral, but not formed as a racemic (A) ester (C) glycerol (B) saturated carbon chain (D) unsaturated carbon chain Which of these reactions displays the best atom economy? 56. mixture. Br NaCN CN 61. Which sequence produces aldehydes from 2-pentyne? (A) Hz/Lindlar's catalyst followed by ozonolysis (B) H/Lindlar's catalyst followed by H'H.O (C) Ho/Pd followed by ozonolysis (D) H/Pd followed by MCPBA OH H2SO HBr 62. Which reagent(s) will accomplish this transformation but Br NaH would not be recommended for use because of hazardous waste issues? 57. Which molecule is the most reactive towards 50% H,SO/H,O (A) epoxidation? (B) OsO, followed by NaHSO (C) conc. HSO, followed by H,O/heat (D) Hg(OAc)/H2O followed by NaBHA What is the main product for this reaction? 63. OH TsCI NaN 58, what is the major | 20, H2SO4 H pyridine DMSO product of this reaction? CI OH OH OH OH OH 59. Which hydrogen would be abstracted first when mono- brominating with Br2 and light? Hc Ha (A) H, (B) H (C) H (D) HsExplanation / Answer
55. answer: C
56. answer: c
57. answer: b
58. answer: a
59. answer: b
60. answer: b
61. answer: a
62. answer: d
63 .answer: c
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