51. Which is NOT a valid resonancestructure for the conjugate baseof this molecule?(A)(C)S(A)OEtO:O:: OEtHBrROOROCH 3(B)52. What is the major product of this reaction sequence?OPPh3(D)11Mgether(B)deOEt:0aomСосноLOCH 353. Which reagent is necessary for this transformation?(D)HOEtHOEtCH31PPh3ACS56.

IN the first question there are three resonance structure are possible, so C will be the answerIn…

. Which is NOT a valid resonance structure for the conjugate base of this molecule? (A) (C) (A) :0 (C) O S OEt : 0: : OEt HBr ROOR a (B) OCH3 (D) Mg ether 2. What is the major product of this reaction sequence? O (B) (D) &e :0: H ملول OEt H O OEt OEt CH31 XOH LOH Сосно LOCH 3 ACS

. Which is NOT a valid resonance structure for the conjugate base of this molecule? (A) (C) (A) :0 (C) O S OEt : 0: : OEt HBr ROOR a (B) OCH3 (D) Mg ether 2. What is the major product of this reaction sequence? O (B) (D) &e :0: H ملول OEt H O OEt OEt CH31 XOH LOH Сосно LOCH 3 ACS

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter22: Carbonyl Alpha-substitution Reactions

Section22.SE: Something Extra

Problem 64AP: The key step in a reported laboratory synthesis of sativene, a hydrocarbon isolated from the mold...

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Concept explainers

Bond Parameters

Many factors decide the covalent bonding between atoms. Some of the bond parameters are bond angle, bond order, enthalpy, bond length, etc. These parameters decide what kind of bond will form in atoms. Hence it is crucial to understand these parameters in detail and understand how changing these parameters affects the kind of bonding or various characteristics.

Bond Dissociation Energy

The tendency of an atom to attract an electron is known as its electronegativity.

Question

51. Which is NOT a valid resonance
structure for the conjugate base
of this molecule?
(A)
(C)
S
(A)
OEt
O
:O:
: OEt
HBr
ROOR
OCH 3
(B)
52. What is the major product of this reaction sequence?
O
PPh3
(D)
11
Mg
ether
(B)
de
OEt
:0
aom
Сосно
LOCH 3
53. Which reagent is necessary for this transformation?
(D)
H
OEt
H
OEt
CH31
PPh3
ACS
56.

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