The more polar bond has to be indicated using partial charge of δ + o r δ − . C − O a n d C − N Concept Introduction: The partial negative ( δ – ) end of a bond is the atom with the larger electronegativity. The partial positive ( δ + ) end of a bond is the atom with the smaller electronegativity.
The more polar bond has to be indicated using partial charge of δ + o r δ − . C − O a n d C − N Concept Introduction: The partial negative ( δ – ) end of a bond is the atom with the larger electronegativity. The partial positive ( δ + ) end of a bond is the atom with the smaller electronegativity.
Solution Summary: The author explains that the more polar bond can be indicated using partial charge of delta –) and the positive end of a bond is the smaller electronegativity.
The more polar bond has to be indicated using partial charge of δ+orδ−.
C−OandC−N
Concept Introduction:
The partial negative (δ–) end of a bond is the atom with the larger electronegativity. The partial positive (δ+) end of a bond is the atom with the smaller electronegativity.
(b)
Interpretation Introduction
Interpretation:
The more polar bond has to be indicated using partial charge of δ+orδ−.
B−OandP−S
Concept Introduction:
Refer part (a).
(c)
Interpretation Introduction
Interpretation:
The more polar bond has to be indicated using partial charge of δ+orδ−.
P−HandP−N
Concept Introduction:
Refer part (a).
(d)
Interpretation Introduction
Interpretation:
The more polar bond has to be indicated using partial charge of δ+orδ−.
Protecting Groups and Carbonyls
6) The synthesis generates allethrolone that exhibits high insect toxicity but low mammalian toxicity. They are used in pet
shampoo, human lice shampoo, and industrial sprays for insects and mosquitos. Propose detailed mechanistic steps to
generate the allethrolone label the different types of reagents (Grignard, acid/base protonation, acid/base deprotonation,
reduction, oxidation, witting, aldol condensation, Robinson annulation, etc.)
III + VI
HS
HS
H+
CH,CH,Li
III
I
II
IV
CI + P(Ph)3
V
༼
Hint: no strong base added
VI
S
VII
IX
HO
VIII
-MgBr
HgCl2,HgO
HO.
isomerization
aqeuous solution
H,SO,
༽༽༤༽༽
X
MeOH
Hint: enhances selectivity for reaction at the S
X
☑
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