36. The ring-opening of cyclic ethers happens through cleavage by suitable nucleophiles. Which among the structures below will be the most susceptible to ring-opening? 8 42. Arrange the following sets of compounds in order of their decreasing boiling points. A. CH₂(CH₂)OH, CH₂CH₂CH₂CH₂OH, CH₂CH₂CH₂OH, CH₂CH₂OH B. CH,CH,OH, CH CH.CH,OH, CHICH.CH/CH,OH, CH3CH₂OH C. CH CH.CH/CH,OH, CH(CH₂).OH, CH-CH₂OH, CH-CH₂CH2OH D. CHICH.CH:OH, CHICH:CH-CH₂OH, CH(CH₂OH, CHICHOH

36. The ring-opening of cyclic ethers happens through cleavage by suitable nucleophiles. Which among the structures below will be the most susceptible to ring-opening? 8 42. Arrange the following sets of compounds in order of their decreasing boiling points. A. CH₂(CH₂)OH, CH₂CH₂CH₂CH₂OH, CH₂CH₂CH₂OH, CH₂CH₂OH B. CH,CH,OH, CH CH.CH,OH, CHICH.CH/CH,OH, CH3CH₂OH C. CH CH.CH/CH,OH, CH(CH₂).OH, CH-CH₂OH, CH-CH₂CH2OH D. CHICH.CH:OH, CHICH:CH-CH₂OH, CH(CH₂OH, CHICHOH

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter7: Alkynes

Section: Chapter Questions

Problem 7.29P

See similar textbooks

Similar questions

These reagents can produce ketones with alkynes A. BH3, THF, H2O2 B. KMnO4 C. O3 D. H2SO4, H2O, HgSO4 choices:A,DB,CA,B,CA,B,C,D
2: Draw the structure of the starting materíals and reagents (A, B, C) needed to prepare the given product. 1. C но Mg, ether A 2. H,0
1. Write the structure of the major organic product for reactions a, b and e? H₂C b. H₂c- CH, CH₂ Cold KMnO, OH A KMnO, H c. CH3CH₂-CH=CH-CH₂CH3 + H₂SO4 →
What is the role of phosphoric acid in the synthesis of cyclohexene? it is an antioxidant that prevents free radical side reactions it is a safe, non-toxic solvent it lowers the boiling point of the reaction mixture (a colligative property of adding phosphoric acid to water) it protonates the hydroxyl of cyclohexanol to make it a better leaving group
D Rank the alcohols in each group in order of increasing reactivity when dehydrated with H₂SO4. a. (CH3)2C(OH)CH₂CH₂CH3 (CH3)2CHCH₂CH₂CH₂OH (CH3)2CHCH₂CH(OH)CH3 b. OH CH3 OH HO CH3
Rank the compounds according to their increasing reactivity toward electrophilic substitution. 1. Benzaldehyde 2. o-dimethylbenzene 3. nitrobenzene 4. phenol
one hemiacetal and one acetal bond in the following dissacharide. Please them and indicate which kind of bond it is. H. Н ОН OHO HO H- H. H. H. ОН OH H. H- -H- H. H. OH ОН
1 When epoxides react, they undergo ring-opening by a cleavage of the C-O bond. Why is it easier to break a C-O bond of an epoxide compared to breaking a C-O bond of other ethers? A. A more stable carbocation is formed when an epoxide ring-opens. B. Breaking the epoxide C-O bond relieves the strain of a three-member ring. C. Epoxide ring opening conforms to a faster E2 mechanism. D. Mechanistically, the epoxide carbon always becomes protonated, enhancing it's ring opening reactivity.
1 When epoxides react, they undergo ring-opening by a cleavage of the C-O bond. Why is it easier to break a C-O bond of an epoxide compared to breaking a C-O bond of other ethers? A. A more stable carbocation is formed when an epoxide ring-opens. B. Breaking the epoxide C-O bond relieves the strain of a three-member ring. C. Epoxide ring opening conforms to a faster E2 mechanism. D. Mechanistically, the epoxide carbon always becomes protonated, enhancing it's ring opening reactivity. 2. Which of the following is NOT an organometallic compound? A. CH,CH,CH,Li (CH3)₂Zn D. K [O-C(CH3)3)]¯ 3. Which carbon-metal bond has the largest ionic character? (Given: electronegativities: C 2.5, Al 1.5, Mg 1.2, Zn 1.6, Cu 1.9) A. C-Zn B. C-Mg C. C-Cu A 4 Which of the following is the correct mechanism for epoxide ring opening in basic solution (hydroxide catalyzed) ? Choose either A or B. CH₂ 70% CH₂ H-O-H B. (CH₂CH₂) Pb C. e :OH CH: CH₂ ✪. H B • H-O-H CH₂ CH; :0: D. C-Al :OH :OH CH₂ CH₂ :OH :OH CH;…
4. Which of the following reactions can be used to prepare 11-diphenyl-1-propanol? OH I. II. III. CH₂CH₂C снене-ось CH₂CH₂C -OCH3 PO 1. 2. H₂00 1. ? 2. H30Ⓡ MgBr MgBr 1. CH3CH₂ MgBr 2. H30
Ql- Arrange the following carbonium ion as more stable. Why? Me Me „Me A C Q2- Choose the substituted group that makes the following reaction faster. Why? X- CH2 H X- ососн, OR COOCH} Y= NH2 OR NO2 Q3- Which of the following compounds give the highest yield when reacting with a carbonyl compound. Why? NH 2 NH2 NH2 Me Me Me OR OR NO 2 NO2 NO2
Synthesize each compound from toluene and any other organic or inorganic reagents. a. C6HSCH2BR b. C6HSCH2OC(CH3)3 -CHO с. O,N НООС -NO2 d. H,N.