1 When epoxides react, they undergo ring-opening by acleavage of the C-O bond. Why is iteasier to break a C-O bond of an epoxide compared tobreaking a C-O bond of other ethers?A. A more stable carbocation is formed when an epoxidering-opens.B. Breaking the epoxide C-O bond relieves the strain of athree-member ring.C. Epoxide ring opening conforms to a faster E2mechanism.D. Mechanistically, the epoxide carbon always becomesprotonated, enhancing it's ringopening reactivity.2. Which of the following is NOT an organometalliccompound?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-CuA4 Which of the following is the correct mechanism for epoxidering opening in basic solution(hydroxide catalyzed) ? Choose either A or B.CH₂70%CH₂H-O-HB. (CH₂CH₂) Pb C.e:OHCH: CH₂✪.HB•H-O-HCH₂CH;:0:D. C-Al:OH:OHCH₂CH₂:OH :OHCH;CH2:OH :OH

Answered: 1 When epoxides react, they undergo…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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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;
CH2
:OH :OH

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Introduction

Epoxides are cyclic ethers that contain a three-membered ring consisting of two carbon atoms and one oxygen atom. They have unique chemical properties due to the ring strain caused by the angle strain of the C-O-C bond angle. Epoxides can undergo ring-opening reactions, which make them versatile intermediates in organic synthesis. They are widely used as building blocks in the production of various organic compounds such as pharmaceuticals, agrochemicals, and polymers.

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