25 votes

Does benzene structure stand for a single resonance form or the whole molecule?

The answer is you are referring to neither of them. That is because resonance structures don't actually exist in reality. We only use them to give us a rough idea what the actually molecule and bonds ...
Nanoputian's user avatar
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19 votes

Why Is Hydrogen in HSO3- Connected to Oxygen Instead of Sulfur?

It's actually both, at least in solution. Bisulfite ion in solution tautomerizes, existing as an equilibrium of the isomer with hydrogen bonded to sulfur and the isomer with hydrogen bonded to oxygen. ...
Oscar Lanzi's user avatar
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14 votes
Accepted

What is the correct Lewis structure of NH3O?

Technically, both the structures $\ce{H2N-OH}$ and $\ce{H3N\bond{->}O}$ may exist. However, in reality hydrogen atom is rather prone to migration and the second structure is not favorable. So, for ...
permeakra's user avatar
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12 votes

Structure of NO2 compound?

According to Electronic Structure of NO2 Studied by Photoelectron and Vacuum-uv Spectroscopy and Gaussian Orbital Calculations J. Chem. Phys. 53, 705 (1970) : The highest molecular orbital $4a_1$ is ...
DavePhD's user avatar
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12 votes

What is the correct structure of sodium thiosulfate?

Both of your Lewis structures are wrong. In both of the shown structures, the solid line from sodium to oxygen/ sulfur implies that there is a discrete bond between these atoms. This is not the case. ...
Martin - マーチン's user avatar
12 votes
Accepted

Structure of pyrophosphorous acid

Oxyphosphorus compounds, all of which contain phosphorus-oxygen linkages, are the most dominated subset in Phosphorus Chemistry. You may find good review of oxyphosphorus compounds in Ref.1. In ...
Mathew Mahindaratne's user avatar
11 votes

Why does Boron only need 6 valence electrons unlike the standard 8?

The principle of full octet is that most reactivity patterns are described well if there is a driving force / energetic gain for full octets in main-group atoms. However, the only facet of an atom ...
Lighthart's user avatar
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11 votes
Accepted

Lewis Structure For H2SO4

As Jan mentions in the other answer, in general, a Lewis structure is preferred if it retains the octet rule. There can be more complicated bonding, and sulfur and phosphorous are two common examples (...
Geoff Hutchison's user avatar
10 votes

What is the Lewis structure for HClO?

I completely agree with Gonçalo Justino's answer, but would like to add another shade to it. In principle there are quite a few possible arrangements thinkable for this molecule - at least in the gas ...
Martin - マーチン's user avatar
10 votes

Does benzene structure stand for a single resonance form or the whole molecule?

I've seen the following drawing used instead of the three double bonds. The circle signifies that the ring is aromatic. It's an alternative that is used to show that all bonds are the same.
MaxW's user avatar
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10 votes

Misleading features of Lewis Dot Representation

Lewis dot structures predate the advent of modern quantum theory and quantum chemistry. There is no Schroedinger equation associated with them -- in fact placing a dot on an atom (seems to me that it) ...
Eric Brown's user avatar
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9 votes

Is SbF5 symmetrical?

As mentioned in the comments, $\ce{SbF5}$ in the gas phase has a rather high symmetry, the point group looks like $D_\mathrm{3h}$ to me, containing a principal three-fold rotational symmetry axis (...
TAR86's user avatar
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9 votes
Accepted

Lewis structure of dinitrogen trioxide

What really happens in nature has higher priority than our believe what happens or should happen. See Dinitrogen_trioxide with the structure, bond lengths and angles. Be aware both $\ce{NO}$ and $\ce{...
Poutnik's user avatar
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8 votes
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Why does CO2 accept electrons?

Consider that the carbon in carbon dioxide is bonded to two electronegative oxygen atoms. This will cause shift the electrons towards the oxygens and away from the carbon, making it electron deficient:...
ringo's user avatar
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8 votes
Accepted

Where do the lone pairs go in the "true" resonance structure?

Resonance is a concept resulting from valence bond (VB) theory. Within this theory it is impossible to describe delocalisation. However, every configuration within this framework can be expressed as a ...
Martin - マーチン's user avatar
8 votes

Structure of pyrophosphorous acid

Most of the online data banks such as PubChem don't bother with showing proper bond multiplicity since they are focused on searching for the compounds based on connectivity graphs. It doesn't mean ...
andselisk's user avatar
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8 votes

Lewis Structure of OF+

A strategy different from the one described by Yusuf Hasan would be to look at the neutral isoelectronic molecule. The oxygen atom is isoelectronic to the fluorine cation, so $\ce{OF+}$ is ...
Karsten's user avatar
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7 votes

Structure of NO2 compound?

Nitrogen dioxide has 17 valence electrons, and is bent with an angle of 134 degrees and bond lengths 0.119 nm. Electron spin resonance experiments place the odd electron on the nitrogen in a $\sigma$ ...
porphyrin's user avatar
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7 votes
Accepted

What is the correct Lewis structure of diazomethane?

The image above depicts three mesomeric structures of diazomethane ($\ce{CH2N2}$). When you count the valence electrons for every atom, you will find that only the left and middle structure satisfy ...
Jannis Andreska's user avatar
7 votes
Accepted

Why can one double bond exist in some resonance structures but two can't?

In your drawn example, the red-boxed structure requires the carbon atom to have five bonds, which, to channel my secondary school teacher, says "yuck, I don't like that". This is a case of breaching ...
Nij's user avatar
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7 votes
Accepted

What is the structural formula of alkali hypohalite: MOX or MXO?

I felt tempted to close this as a duplicate of the sodium acetate notation question, because of my answer there, but the question in itself does not ask the same thing, so I’ll just rewrite the ...
Jan's user avatar
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7 votes

What's the structure of "inorganic benzene"?

"Inorganic benzene" also known as borazine has a molecular formula of $\ce{B3N3H6}$. It is a planar structure. Both B and N are sp2 hybridised. It is called "inorganic benzene" as it is isoelectronic ...
Chloritone_360's user avatar
7 votes
Accepted

Lewis structure for NCO+

As always, writing a Lewis structure seems to be a trivial task, but sometimes it just isn't. The smaller the molecule becomes, more often than not the bonding situation becomes more complicated and ...
Martin - マーチン's user avatar
7 votes

Lewis structure for magnesium diboride

It's not really a molecule, so you don't really have a Lewis structure consisting of one magnesium and two boron atoms. For a lattice structure see Wikipedia. The lattice structure is hexagonal with ...
Oscar Lanzi's user avatar
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7 votes
Accepted

Lewis Structure of OF+

A good way to think about stuff like this, is to imagine a possible synthesis for the given intermediate. One way of making this species would be to cleave the H-OF bond of HOF against it's ...
Yusuf Hasan's user avatar
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7 votes
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Why does ammonium chloride form an ionic bond?

Quick Answer Explicit valence of $\ce{N}$ is four, $\ce{N}$ of $\ce{NH4+}$ cannot form another (covalent) bond with $\ce{Cl-}$. The chemistry of $\ce{NH4+}$, owing to similar size, charge, and ...
ananta's user avatar
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6 votes
Accepted

Why is this a Lewis structure of ethyl acetate?

The two rules you cite are guidelines for the 'best' Lewis structure. However, in the example provided, all electrons are accounted for and all atoms are connected making it a 'valid' Lewis structure....
Lighthart's user avatar
  • 6,609
6 votes

What is the correct Lewis structure for calcium phosphate?

Calcium phosphate crystallises in a number of different modifications of which β-$\ce{Ca3(PO4)2}$ is the stable room temperature and ambient pressure modification. It has a rather complex ...
Jan's user avatar
  • 67.7k
6 votes

Which relatively simple molecules violate the octet rule?

In a rather different vein are aromatic carbocations such as the cyclopropenyl cation Source: http://www.chem.ucla.edu/~harding/IGOC/C/cyclopropenyl_cation.html As can be seen, each of the ...
Oscar Lanzi's user avatar
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