Questions tagged [lewis-structure]

For questions about determining Lewis structures (or their validity) for different chemical species. Do not use this tag if your question is about determining [oxidation-state] or [formal-charges], use the other respective tags instead.

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Lewis structure of CN radical

I need to draw the Lewis formula for $\ce{CN}$. However, I am not sure how to draw the single free electron. My idea would be as follows: $$\Large\ce{\llap{·}C#N\rlap{:}}$$ Does that make sense?
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1answer
61 views

Bond angle and bond lengths in Arginine

Based on the Lewis structure of arginine, the terminal primary amine attached to the guanidine group seems to be $\mathrm{sp^3}$ hybridized and trigonal pyramidal. Also, in quantum mechanical ...
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3answers
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Why is the structure of HNO3 have a central atom rather than being linear?

Why is the structure of $\ce{HNO3}$ have a central atom rather than being linear? I know formal charges need to be reduced as much as possible, and if there was a structure with two oxygens and a ...
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1answer
65 views

In the Lewis structure for barium fluoride, why does barium lose its valence electrons?

I searched for $\ce{BaF2}$ Lewis structure, and found out that the Barium atom loses its 2 valence electrons to form $\ce{F- Ba^2+F-}$. Before seeing it I thought each of $\ce{Ba}$'s valence ...
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0answers
76 views

Why isn't O=N-O-O the best lewis structure for NO3-?

I'm practicing lewis structures and I'm stuck on the one for NO3 -1 (nitrate ion). I understand that N has to be the central atom because it is the least electronegative, but I'm confused why all the ...
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1answer
51 views

Lewis structure of benzenediazonium [closed]

In the benzenediazonium $\ce{C6H5N2+}$ the nitrogen contributes its lone pair to the carbon in benzene. So where is one electron of that carbon, since it is not used for bonding with nitrogen where ...
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1answer
57 views

How to use Lewis theory to differentiate between an acid and a base?

According to Lewis theory a material is an acid if it accepts an electron pair, and a material is base if it donates an electron pair. But if we compare the structures of $\ce{HNO3}$ and $\ce{NaOH}$, ...
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0answers
47 views

How can nitrogen be quadruply bonded in tris(8-hydroxyquinoloinato)aluminum?

Nitrogen typically has five outer valence electrons. So how does a triply-bonded nitrogen in 8-hydroxyquinoline end up quadruply bonded in tris(8-hydroxyquinolinato)aluminum?
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0answers
80 views

Can the Lewis dot structure of SO2 be experimentally verified?

I have just watched 2 different videos on the Lewis dot structure of sulfur dioxide, $\ce{SO2}$. One says it is $$\ce{O=S=O}$$ and the other says $$\ce{^-O-S^+=O <-> O=S^+-O-}$$ The first ...
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1answer
240 views

Why (SO4)^2- does not create 4 double bonds

I looked this question up and still couldn't understand. Why, in $\ce{SO4^2-}$ don't the 4 oxygens create double bonds. In that case the all the oxygens will have 0 formal charge while the sulfur ...
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4answers
600 views

Structure of pyrophosphorous acid

What is the structure of pyrophosphorous acid? I asked this question here because the answer which I found on web and other resources are inconsistent which each other. For example, following data is ...
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1answer
51 views

Expanded structure formula and Lewis dot structure, whats the difference?

I am teaching my self the basics of chemistry and I have done lewis dot structure before. Right now I am going into carbon chemistry which often use structure formulas to represent compounds. There is ...
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0answers
26 views

How to rationalise the resonance structures of nitrogen dioxide?

The following image depicts resonance in $\ce{NO2}$ molecule: I don't know if it is obvious or not, but I'm puzzled by this structure. I've read about the structure of the $\ce{NO2}$ compound, but it ...
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0answers
67 views

Linear algebra in Lewis structures?

In general, I have come across a phenomenon in chemistry where solutions to certain types of problems can often seem frustrating when trying to work out by hand, as they seem to depend on each other ...
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0answers
109 views

Oxidation state of N in NO from resonance

I know from a textbook that nitrogen has an oxidation state of +II in NO, and this is easily verified if O is assigned -II. However, if one looks at the resonance structure and assigns covalent ...
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3answers
181 views

How to identify the most stable Lewis adduct of boron trichloride?

Which of the following is the most stable Lewis acid–base adduct? (a) $\ce{H2O\bond{->}BCl3}$ (b) $\ce{H2S\bond{->}BCl3}$ (c) $\ce{H3N\bond{->}BCl3}$ (d) $\ce{H3P\bond{->}BCl3}$ ...
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0answers
164 views

What studies show that d orbitals don't play an important role in covalent bonding? (> period 2 elements) [closed]

Take a look at all the following molecules: $\ce{SO3^{2-}}$, $\ce{SO2}$, $\ce{SO4^2-}$, $\ce{PF5}$ and many more you can add. In all these there is a controversy of one of these two types: Is formal ...
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1answer
260 views

How can I interpret the CH4+ structure?

I am trying to teach myself about Electron Ionization, and am very confused about the formation of the CH4+ Ion. Do the dotted lines between the C and the H, and between the two Hydrogens indicate a ...
6
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1answer
200 views

Lewis structure for magnesium diboride

What is the Lewis structure for $\ce{MgB2}$? I just read that it is a superconducting material (up to a relatively high critical temperature, 39 K) and am wondering if this has to do with its ...
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0answers
665 views

Lewis structure of ClO radical

The commonly shown structure of the ClO radical described here has a single bond between the chlorine and oxygen atoms. In that structure, chlorine has a formal charge of 1, and oxygen has a formal ...
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1answer
129 views

What is the lewis structure of NO [duplicate]

I am a bit confused about the lewis structure of $\ce{NO}$ The answer from my worksheet is $\ce{N=O}$ with nitrogen having a free radical. But I drew the structure as N triple bonded to $\ce{O (:N#O:)}...
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0answers
461 views

What is the Lewis dot diagram for molybdenum and cerium? [closed]

How do I draw a Lewis diagram for $\ce{Mo}$ and $\ce{Ce}$? I am a bit confused since they are transition metals. Attempt The outer electron configuration for $\ce{Mo}$ is $\ce{5s^1 4d^5}$. The number ...
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0answers
90 views

Question about resonance structures [duplicate]

I stumbled upon an exercise asking to draw the resonance structure of $\ce{SO4^{2-}}$. We can choose between the resonance structures by calculating the formal charges and by checking which one gives ...
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1answer
393 views

How can chlorine have 10 electrons around it in chlorine trifluoride?

I'm relatively new to chemistry, and while doing some exercises about $\ce{ClF_3}$ I tried to draw where the electrons are. I checked Google and got this: How is this structure possible? From what I'...
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1answer
126 views

Structure of PH4Br [closed]

What is the structure of PH4Br? I wanna know which atom is bonded to which. Does all five atoms are directly bonded to phosphorus?
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2answers
2k views

Is SbF5 symmetrical?

SbF5 forms a trigonal bipyramidal shape. There are polar bonds present and I assumed that it is non polar because of it's molecular geometry. However, The molecule itself is not entirely symmetrical (...
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2answers
975 views

Rules to identify the most stable resonance structures

While studying resonance from this Chemistry LibreTexts article, I found the rules to follow in order to decide which structure is the most stable. Among them: The structure with the least number of ...
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2answers
7k views

Lewis Structure For H2SO4

When I was drawing the lewis structure for $\ce{H2SO4}$ I got this configuration, now I know this isn't the best configuration but I don't see whats wrong with it. The number of valence electrons is ...
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1answer
604 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 ...
4
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1answer
947 views

Formal charges on polyatomic ions

Why is it that sometimes a polyatomic ion's Lewis structure is adjusted to remove the formal charge on the central ion, but sometimes it is not? For example, in the $\ce{I3-}$ ion (triiodide), the ...
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1answer
708 views

Lewis dot structures of CO2

I know the general Lewis dot structure of carbon dioxide is the one where there are two double bonds connecting oxygens to carbon. However the question is, does $\ce{CO2}$ have resonance structures? ...
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1answer
19k views

Lewis Structure of SO2 [duplicate]

What is the structure of SO2? I have seen two different ways the Lewis Structure is written: The formal charges of the SO2 with the single bond and a double bond is larger than the SO2 with two ...
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1answer
481 views

Chemical structure of xenon heptafluoride anion

When $\ce{XeF6}$ acts as a fluoride acceptor, $\ce{XeF7-}$ is formed. What is the hybridisation, geometry, and shape of $\ce{XeF7-}$?
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50 views

How can chlorine form ClO2? [duplicate]

Doesn't it have only have one bonding electron? Then how can it bond with 2 oxygens? The Lewis structure doesn't make much sense to me.
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2answers
464 views

Misleading features of Lewis Dot Representation

Today I had an embarrassing experience when I sat to help my nephew learn Lewis' Dot Representation and realized that I actually don't get it at all. I have a physics background and always thought ...
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1answer
555 views

Difference in bond orders between formaldehyde and carbonate [closed]

So I am asked to find the bond order for both of them. I drew the correct Lewis structure, and there's one C-O double bond (and 2 other single bonds). I determined the bond order in CO3 (2-) to be 1....
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1answer
156 views

Major contributor for resonance [duplicate]

I was doing some practice problems, and apparently 6 is the main contributor, due to having all full octets, but I'm not seeing how the oxygen with the + formal charge has a full octet in this case. I ...
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1answer
283 views

Polarity of symmetric Lewis structure [closed]

Why is $\ce{CF2Cl2}$ polar? The Lewis dot structure shows the molecule as being symmetric. Wouldn't that make it nonpolar?
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1answer
922 views

How to identify lewis acids and bases

What is the general methodology to identify Lewis acids and bases in an acid base reaction? Do we need to draw structures to identify which species is the electron donor and which one the acceptor, or ...
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1answer
1k views

Do atoms react to fill outer shell or 8 valence electrons? [duplicate]

I recall in middleshool chemistry we simply said electron shell configurations were 2,8,8,many which I would have no problems with. But now I'm learning that shells contain $2n^2$ electrons where n ...
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1answer
498 views

Which of the following Lewis Structures is NOT correct? [closed]

Which of the following Lewis Structures is NOT correct?
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1answer
393 views

The MO and unpaired electrons

I am learning molecular orbital in general chemistry. I have come across this question that asks me to show that the Lewis structure of $\ce{O2}$ is actually an excited state when viewed in terms of ...
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1answer
3k views

AP Chemistry Practice exam [closed]

It's starts off the question with "Propanoic Acid, $\ce{C2H5COOH}$, is an organic acid that is a liquid at room temperature. An incomplete Lewis diagram for the propanoic acid molecule is provided in ...
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2answers
455 views

Why does this compound have two benzene rings? [duplicate]

If we look at carbons 1 and 2, they have 5 electrons. 3 are directly involved in bonding, and 2 are involved in delocalisation to create the 2 benzene rings. This would mean that they had 5 valence ...
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1answer
654 views

Why is arsenic trichloride more likely to be polar than aluminum trichloride?

According to my chemistry teacher, $\ce{AsCl3}$ is more likely to be polar than $\ce{AlCl3}$. Why is this? As I understand it, the difference in electronegativity is what makes a compound more or less ...
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2answers
510 views

How to calculate formal charge?

I am trying to understand formal charge and how it is being calculated. I have copied the image from organic chemistry as a second language below: How do I calculate formal charge? In the book formal ...
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1answer
170 views

Is it possible to use the school supplied algorithm to build the Lewis diagram of the iodate ion?

I am upgrading the grade 12 chemistry credit and have to use the school supplied algorithm to build the Lewis diagram of $\ce{IO3-}$ ion. It seems to me that iodine oxidation state in this ion should ...
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1answer
323 views

Lewis Structure of Fe4(SiO4)3

I'm a first year university student and am working on a paper regarding factors that affect how far an asteroid will penetrate into the Earth's atmosphere before exploding. One of the factors I came ...
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0answers
75 views

Valid resonance contributors for 2-methylthiazole [duplicate]

There's a problem from an old exam that I was trying to do. The original structure is given on the left and they want all the possible resonance forms that have closed-shell atoms (octet for S) and ...
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0answers
4k views

Hybridisation of POCl3 [duplicate]

I was doing lewis structures and i came across a question asking the structure of POCl3. Here, the answer is a tetrahedral shape with P as central atom connected to 3Cl atoms by a single bond and 1 ...