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 dot structure of H3NF2 [closed]

Consider a hypothetical compound $\ce{H3NF2}$. What will be its Lewis dot structure? I'm stuck, since Nitrogen cannot exhibit pentavalence, or at least its not stable (unlike phosphorous in $\ce{H3PF2}...
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2answers
12k 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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3answers
46k views

How is the Nitrate Ion (NO3) formed?

I understand how the nitrite $\ce{NO2}$ ion can be formed and have a negative charge, but the nitrate $\ce{NO3}$ ion is confusing me. I made some simple drawings to try to explain what I don't ...
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1answer
3k views

What to do when there is an odd number of valence electrons left on the the central atom?

For example, I'm trying to write the formula for $\ce{NO}$, and $\ce{ClO2}$. The steps my teacher gave me always assume that the central atom has a full valence, or more than full, after the outer ...
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0answers
2k views

Are bond orders always the same in isoelectronic diatomic species?

In my textbook of chemistry it is written that: In the Lewis description of covalent bond, the Bond order is given by the number of bonds between the two atoms of a molecule. ... ...
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1answer
495 views

Can this sp2 lone pair resonate?

In methyl isocyanate, $\ce{CH3CNO}$, shown below, it seems that the nitrogen lone pair can resonate with the carbon oxygen double bond, generating a resonance structure something like acetonitrile ...
3
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2answers
97 views

Lewis structure of dinitrogen trioxide

I have a confusion related to the structure of $\ce{N2O3}.$ I was taught 1 is the correct one, but I believe 2 is better since it has no formal charge on it. Why is 1 correct and 2 wrong?
4
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2answers
1k views

Why does O2NCl only have two resonance structures?

Why is it that $\ce{O2NCl}$ has only two resonance structures? More specifically, why is the Lewis drawing where $\ce{N}$ is double bonded to $\ce{Cl}$ not considered a resonance structure along with ...
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2answers
2k 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 ...
5
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1answer
203 views

Identifying nucleophiles and electrophiles in an acid-base reaction

Is ammonia a nucleophile and hydrogen the electrophile in the Brønsted-Lowry acid-base reaction of acetic acid with ammonia? $$\ce{CH3COOH + NH3 <=> CH3COO- + NH4+}$$ I say that ammonia is the ...
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1answer
45 views

Where do the three negative oxygens in a phosphate group get their missing electron from?

A video I watched showed the construction of a phosphate group using a Lewis structure. The oxygen with the double bond fills its octet group. The three other oxygens lack an electron. The teacher ...
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1answer
760 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 electrons ...
3
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1answer
7k views

Why does the phosphorus trifluoride molecule have dipole moment?

My book says that from drawing the Lewis structure for the molecule below, you can conclude that it has dipole moment. Can someone please explain why? I understand that the dipole moment expresses ...
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0answers
37 views

Why is Cl2-P-O-Cl an unfavourable structure for POCl3?

Why is the structure $\ce{(Cl)2P - O - Cl}$ unfavourable compared to the two structures in the picture? The latter in the picture and the one I stated both have zero formal charge, so I don't really ...
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1answer
71 views

Distribution of negative charges in iodine dioxide difluoride anion [closed]

I was drawing the structure for $\ce{[IO2F2]-}.$ I'm stuck on whether the negative charge should be given to oxygen or iodine.
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1answer
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Boric Acid - Mechanism of Acidity

I was wondering how one could test the hypothesis that boric acid behaves not as a Brønsted acid but as a Lewis acid in that boric acid cleaves water molecules as to make hydrogen protons. rad Could ...
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1answer
44 views

Molecular Structure

What's the meaning of the triangle and striped line in this structure of $\ce{H3O+}$: Can someone suggest me a site to learn about this? (I'm quite a novice in chemistry.) Thanks
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1answer
72 views

Lewis structures and chemical-compound formulas [closed]

In the Lewis structures listed below, M and X represent various elements in the third period of the periodic table. Write the formula of each compound using the chemical symbols of each element: a. b. ...
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0answers
28 views

Correct representation of Lewis structure for sulphate ion

sulphate ion has tetrahedral geometry as predicted by VSEPR theory; the four S-O bonds are indistinguishable and have the same bond order, so the Lewis structure is better represented avoiding S=O ...
6
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2answers
2k views

Lewis Structure of OF+

Would the Lewis Structure for OF+ be drawn so that the more electronegative atom has the more negative formal charge, or would it be drawn to satisfy the octet rule? Here are my thoughts thus far: ...
10
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2answers
743 views

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

There seems to be an inconsistency in the formula. Somewhere it is written as MOX and in some places, it is written as MXO. This is what Google gives when you search sodium hypochlorite: I think the ...
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1answer
96 views

How to draw the structure and find the oxidation number of Phosphorous in H2P2O7 [closed]

Find the Oxidation number of Phosphorus in $\ce{H2P2O7^2-}$. So I thought of drawing the lewis structure to find the oxidation numbers. Because I wasn't sure if Oxygen was bonded to a Hydrogen or not. ...
10
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1answer
5k views

Does sulfur and phosphorus expand their octet?

There are many compounds in which the stability of a molecule is not governed by the presence of octet configuration in central atom. In most of the cases the central atom is generally sulfur or ...
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1answer
174 views

Fastest way to determine if molecule has resonance structures [closed]

I came across this old exam problem: For which of the following choices, is every molecule a resonance hybrid with resonance structures? A. $\ce{SO2},$ $\ce{NH3},$ benzene B. $\ce{SO3^2-},$ $\ce{NH3},...
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2answers
11k views

What is the correct structure of sodium thiosulfate?

Which structure of sodium thiosulfate is correct? One book says the second one (the one with co-ordinate bonds) and the other one says the first one? According to me the structure 2 is correct as in ...
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1answer
102 views

Can methanol act as a ligand? [closed]

As methanol is both a lewis acid and a lewis base, the lewis base part suggests that it can act as a ligand as many bases are. So, is methanol a ligand? And what is the reason behind it?
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82 views

What is the correct electron dot notation of carbon?

My book says that the dot notation for Lewis structure of carbon has 2 possible ways: two dots on the right, one on the top, one on the left one dot on all four sides Why are both of these correct? ...
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2answers
2k 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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1answer
97 views

Why dosen't No2 form according to the octet rule?

Supposedly every atom that is in the second period of the periodic table has to obey the octet rule, this means that they have to be surrounded by 8 electrons (or so I was taught). Studying resonance ...
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1answer
234 views

lewis structure of O3 [duplicate]

This is my first question, sorry if I don't know how to write a good question. why is O3 shaped like this?: and not shaped like each Oxygen molecule is connected to two other molecules? (i did not ...
4
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2answers
922 views

What is the correct lewis structure of SCH⁻?

I need to find the Lewis structure of the ion $\ce{SCH^-}$. I think the Lewis structure should be: $\ce{S=C-H}$, with one lone pair on the carbon and two lone pairs surrounding the sulfur. Is this ...
4
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1answer
18k views

What is the correct Lewis structure of diazomethane?

I tried to google and watch YouTube videos on how to write Lewis structures properly, but I can't seem to understand how to do this correctly. My teacher, when class was in session, gave me a set of ...
2
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1answer
22k views

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

So I was a bit confused. Hydrogen and Boron seem to be the only outliers to the octet rule. Hydrogen makes sense because it has only one shell and 2 electrons complete its shell. Boron's configuration,...
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1answer
323 views

Preferred Lewis structure for sulphate anion and XeO4 [closed]

In a section reviewing Lewis structure, the textbook Atkins' Physical Chemistry, 10th Edition, by Atkins, Paula, and Keeler, gives the following illustration of hypervalence and octet expansion: I ...
2
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1answer
2k views

What is the Lewis structure of the azide ion?

On a chemistry homework, we're asked to draw the Lewis structure of $\ce{N3-}$. My answer: Nitrogen ordinarily has five electrons in its valence; $\ce{N-}$ has six. This makes a total of 16 ...
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0answers
21 views

Why are only two bond structures considered for ozone and not three? [duplicate]

We were taught in chemistry that: Formal charges can be determined by drawing the Lewis dot structure, then subtracting the nonbonding electrons and half of the bonding electrons from the number of ...
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1answer
261 views

Finding the central atom of N2O

Why do all structures of $\ce N_2\ce O$ have Nitrogen as their central atom? Can we not draw a lewis structure with Oxygen as the central atom with 2 double bonds to the two nitrogens? This will still ...
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0answers
90 views

Lewis Structures and electron distribution with oxygen atom

I am a novice in chemistry. I don’t understand the way Lewis structure and how electrons are shared between elements. For instance As we know, Oxygen has six valence electrons that means it has ...
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1answer
67 views

Drawing bicarbonate ion in different way [closed]

I don't know why can't I draw $\ce{[HCO3]-}$ like that: I tried to draw it like that and checked everything. I checked formal charge and all was good. Why they draw it OH I know its also alright but ...
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0answers
165 views

What is the Lewis dot structure for ozone? [duplicate]

Currently I studying about the Lewis dot structure for different compounds and my textbook says that the Lewis structure for ozone may be drawn as(as shown in the image): And then it goes on to ...
0
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1answer
2k views

Understanding the structure of NCS⁻

Predict the most preferable structure of $\ce{NCS-}.$ $$\Large\underset{(\textbf{1})}{\ce{(:\!\!\overset{\huge.\!\!.}{N}=C=\overset{\huge.\!\!.}{\underset{\huge.\!\!.}{S}})-}}\qquad\underset{(\textbf{...
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1answer
499 views

Provide a condensed structure for the following compound [closed]

I keep getting, (CH3)3CCH2CH2CHNH2CHCHCH3. However, the homework system keeps counting it as incorrect, and I don't know what part is incorrect. Thanks for the help!
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0answers
41 views

Is bonds in CO is all 3 coordinate bonds or 2 covalent and 1 coordinate bonds?

Below image is as available in India's Class 11 NCERT Chemistry book vol 1 Page 104. I am confused as it states all 3 bonds are kind of coordinate bonds. Should it not start with 2 covalent bonds and ...
0
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1answer
422 views

Electrons distribution of oxygen atoms in ozone [closed]

While dealing with the Lewis structure for ozone, most of the explanations show the electron distribution around the 3 oxygen atoms with a single and double bond. But if you count the number of ...
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0answers
39 views

Formal charge: size vs electronegativity?

My question is why size is not taken into consideration when deciding major contributors of resonance structures, particularly: why is the formal charge always assigned to the most electronegative ...
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2answers
312 views

Bonding in the nitrate anion [duplicate]

Hi so I was studying chemical bonding where i encountered a problem which is stated below. When we talk about ${NO_3}^-$ we draw its structure as following But the thing which I dont understand is ...
14
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1answer
5k views

Order of dipole moments

What is the order of dipole moments for $\ce{SO3, SiO2, P2O5,}$ and $\ce{Cl2O7}$? This question is from a book and the answer given is $\ce{Cl2O7 < SO3 < P2O5 < SiO2}$. Can someone explain ...
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2answers
2k views

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?
14
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5answers
12k views

Structure of NO2 compound?

What is the correct structure for the $\ce{NO2}$ compound (not ion)? I always thought it was like: since the negative charge would be residing the on the highly electronegative oxygen, but was ...
2
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1answer
336 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 ...