All Questions
10
questions
3
votes
1
answer
427
views
If charge is quantised, how can It delocalize?
As I was trying to understand resonance, I got to know that it was imaginary phenomenon and it is just a tool to explain mechanisms and structures that are unexplained by Lewis dot structures or ...
- 177
0
votes
1
answer
165
views
What is resonance in actuality? (How does electron sharing, bond formation, and overlapping of orbitals take place in resonance hybrids?) [duplicate]
In this post I got an answer to the question "what is resonance".
What I understand overall is that "resonance is not something really happening physically, it is just an idea to make ...
1
vote
0
answers
140
views
Why does allyl anion have only two resonance structures?
There are only two resonance structures of allyl anion with negative charge distributed over positions 1 and 3:
$$\ce{\overset{-}{C}H2-CH=CH2 <-> CH_2=CH-\overset{-}{C}H2}.$$
What's the criteria ...
- 1,134
3
votes
1
answer
2k
views
Confused about identifying delocalized electron pairs in Isoniazid
I have to identify delocalized electron pairs in Isoniazid (pairs not shown in the image below):
I know the nitrogen in the ring has a localized electron pair, since it already forms a pi bond. I'm ...
6
votes
1
answer
2k
views
Where do the lone pairs go in the "true" resonance structure?
Consider the "true" resonance structure of $\ce{CO3^2-}$:
The bottom diagram leaves out the 2 lone pairs, so 4 electrons disappeared in the bottom image as compared to the top one. Are these ...
- 166
1
vote
0
answers
694
views
Why aren't free radicals considered resonance forms?
In C, the answer states that electrons must come in pairs. And so C does not show resonance forms.
But here I read that if there is an unpaired electron, it is a free radical. Why can't free radicals ...
- 2,853
1
vote
1
answer
2k
views
Understanding how electrons are counted for lone pairs vs. bonds especially when understanding resonance?
This is taken from the book Organic Chemistry I as a Second Language 3E: Translating the Basic Concepts[1] from page 35.
In the following image:
It is seen that when the electrons from the double ...
- 157
3
votes
1
answer
968
views
Arrow pushing: why does the O become positive when its lone pair becomes a double bond?
In the following image:
The oxygen's top pair of electrons forms a double bond.
But in a covalent bonds, aren't the electrons shared? So won't the oxygen still have these $2$ electrons (that it ...
- 2,853
2
votes
1
answer
743
views
Aromaticity of 1,1'-bi(cycloprop-2-en-1-ylidene) and 1,4-dioxine
Are these Anti aromatic/aromatic or non aromatic?
1.
Here, if we were to consider the resonating structure(s) with charge separation
One ring is aromatic and other is anti aromatic, and secondly ...
- 1,175
1
vote
2
answers
11k
views
Why does the phosphate ion have resonance structures?
My first-year chemistry teacher depicted $ \mathrm{PO_{4}^{3-}}$ as exhibiting the resonance structure inset below this question.
However, I can't figure out what diagramming rules (which is what ...
- 2,335