BackThe given was missing some important resonance forms of the intermediates shown in brackets. Complete this mechanism by drawing all the resonance forms of these intermediates. Do your resonance forms help to explain why this reaction occurs under very mild conditions (water with a tiny trace of acid)?
For each of these ions, draw the important resonance forms and predict which resonance form is likely to be the major contributor.
(a)
Draw the important resonance contributors for both resonance-stabilized cations (in brackets) in the mechanism for acid-catalyzed hydrolysis of an amide.
Which resonance contributor in each pair makes the greater contribution to the resonance hybrid?
d.
Draw resonance contributors for each of the following species and rank them in order of decreasing contribution to the resonance hybrid. Then draw the resonance hybrid.
d.
Draw the resonance contributors for the following radicals:
c.
Draw resonance contributors for the following ions:
d.
Draw all resonance structures of the following carbanion and carbocation.
(a)
(b)
For each of the following compounds, draw the important resonance forms. Indicate which structures are major and minor contributors or whether they have the same energy.
(e) [CH3C(OH)2]+
(f) [CH2CHNH]–
Draw the important resonance forms of the following free radicals.
(c)
(d)
Which resonance contributor in each pair makes the greater contribution to the resonance hybrid?
a.
b.
a. Draw resonance contributors for the following species. Do not include structures that are so unstable that their contributions to the resonance hybrid would be negligible. Indicate which are major contributors and which are minor contributors to the resonance hybrid.
b. Do any of the species have resonance contributors that all contribute equally to the resonance hybrid?
13.
Determine whether the following pairs of structures are actually different compounds or simply resonance forms of the same compounds.
i.
j.
k.
l.
Draw the important resonance forms of the following cations and anions:
(c)
(d)