Covalent compounds are chemical compounds in which all intermolecular bonds between atoms are considered mostly covalent - have stronger covalent than ionic or metallic component.

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Nature of Bond in Methylammonium lead Halide

I want to know about the nature of bond in Methylammonium Lead halide(CH3NH3PbX3),a perovskite compound.I went through wikipedia and many other sites and through certain research papers but I didn't ...
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36 views

Intermolecular forces - Covalent bonding

Im confused. How to relate permanent dipole dipole moment, temporary dipole induced dipole and Van der waals forces of attractrion?
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42 views

is it possible for covalent compounds to produce colour during flame test?

I have heard it is the metal ions that are the reason for flame colour during a flame test. so in covalent bond, there are no metal ions does that mean covalent compounds don't produce flame colour. ...
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38 views

Is Fajan's rule only applicable to ionic compounds?

Is Fajan's rule applicable to only ionic compounds? The rules only talk about anions and cations, but I have come across examples like $\ce{MnO4-}$ in which high oxidation state of $\ce{Mn}$ leads to ...
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95 views

AlCl3: ionic and covalent?

My textbook states that AlCl3 is both an ionic and a covalent compound .How is it so?
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54 views

What makes carbon special? [duplicate]

We are home schooling my son, and right now we are covering chemistry- ionic bonds, covalent bonds, etc. We've talked about how carbon is "special" in that it can form very complex molecules (organic ...
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Why do XeO and XeF8 not exist?

Since Neil Bartlett's 1962 discovery that xenon was capable of forming chemical compounds, a large number of xenon compounds have been discovered and described. Almost all known xenon compounds ...
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76 views

Does increasing electronegativity imply more covalent character?

If there is a larger electronegativity difference between two atoms, shouldn't the compound be more ionic? In an explanation of the diagonal relationship, it states that "on moving across the period, ...
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77 views

Partial charges in a covalent bond

My professor stated the following statement: In a covalent bond, there is a presence of a partial charge in the atoms that combine to form a compound. For example in $\ce{H2O}$, since $\ce{O}$ is ...
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36 views

N-O bonds in Nitric acid

The wikipedia article on nitric acid mentions the following structure of $\ce{HNO3}$ in which the two $\ce{N-O}$ bonds (other than that of $\ce{N-OH}$) are of different length i.e., $119.9\,\mathrm{...
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41 views

Why do covalent bonds need a pair of electrons?

If it didn't require a pair of electrons and the atom could share one of its electrons, then noble gases would be able to form compounds by sharing one of its electrons without the other one giving ...
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106 views

Covalent and Ionic bonds with Semi-metals

why are some semimetals considered as a metal, and some, a nonmetal when paired with some atoms. Like in BF, it is an ionic bond, but in SiCl, it is a covalent bond. Do their electronegativities ...
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Are Tellurium Fluoride or Antimony Fluoride Ionic?

I would like to know if any of the tellurium fluorides or antimony fluorides are ionic. I am aware that the difference in electronegativity is greater than the 1.665 cutoff indicating ionic bonds. ...
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89 views

Is trisulfuric acid hypothetical?

In the preparation of sulfuric acid through contact process, Hot sulfur trioxide passes through the heat exchanger and is dissolved in concentrated $\ce{H2SO4}$ in the absorption tower to form ...
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49 views

Is the difference between ionic and covalent bonds continuous or is there some non arbitrary point where one becomes the other?

Covalent bonds can be dipole. So is an ionic bond a very dipole covalent bond or is my understanding wrong?
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84 views

How do covalent crystals melt?

A network solid, like diamond or silicon dioxide, has a lattice of covalent bonds that make up a giant structure. Normally when you melt a simple molecular substance, you are breaking the inter ...
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Increasing Covalent character increases Colour intensity

I observed some trends as follows:- $\ce{PbCl2}$ white and $\ce{PbI2}$ yellow $\ce{SnCl2}$ white, $\ce{SnCl4}$ red and $\ce{SnI4}$ black $\ce{AgCl}$ white, $\ce{AgI}$, $\ce{AgBr}$ and $\ce{Ag2CO3}$...
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107 views

Covalent Compounds in Water [closed]

A book that I have contains the following line :- In trivalent state, most of the compounds being covalent are hydrolysed in water. Taken from NCERT textbook (link:http://www.ncert.nic.in/ncerts/...
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557 views

How many hydrogen bonds in these compounds?

We usually get some questions about how many hydrogen bonds these compounds can create, we use it to differentiate between the boiling point of each one of them so it would be great if you could help ...
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What type of bonding is present in lithium tetrahydridoaluminate?

I can tell that the negative ion has one bond which is a co-ordinate/dative covalent bond. However, overall, would you say that lithium tetrahydridoaluminate (lithium aluminium hydride) is ionic? If ...
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144 views

How many electrons will be shared?

Suppose we are to make a bond drawing of a covalent bond between two nitrogen atoms. How would we know how many electrons are shared in each (3)? Do we just logically look at it and see how many ...
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119 views

Would tin (II) sulfide be considered a covalent network solid?

Considering that tin has a Pauling electronegativity of 1.96 and sulphur 2.58, and that a bond is considered to be ionic with a Pauling EN difference of approx. 1.7 at the least, would tin (II) ...
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1answer
315 views

Is FeS2 both an ionic and covalent compound? [duplicate]

Iron (II) disulfide. Iron pyrite. Fool's gold to some. But what bond does it fall under? It could possibly be used for both? This would give a deeper understanding into other like examples, where ...
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26 views

Coupling patter for a methyl-butyl ether [duplicate]

What would the high resolution H-NMR spectroscopy coupling pattern look like for the hydrogen attached to the carbon the arrow is pointing at? I am confused because there is a CH2 connected to either ...
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7 views

how to create a semi permanent dye for eyebrow drawing

I am looking to create a semi permanent dye to use on eyebrows.  I would like to be able to use pigment that is meant for microblading/feathering (tattooing of the skin, skin is needled with small ...
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85 views

Why do BF3 and NH3 react when B has an expanded octet in the adduct?

I know that some elements like sulfur are able to have an expanded octet due to vacant $\mathrm{d}$ orbitals. However, boron and nitrogen do not have any such vacant place so how is it that $\ce{NH3}$ ...
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199 views

What is the geometrical structure of Pb3O4?

I'm confused by the structure of Pb3O4. There are some sites claiming that it is a six membered ring of alternating Lead and Oxygen atoms with another Oxygen atom in the center bonding with 2 out of ...
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441 views

Is KHF2 an ionic compound or a covalent compound?

The statement below is an excerpt from my school textbook:- Because of the tendency of fluorine to form hydrogen bond, metal fluorides are solvated by $\ce{HF}$ giving species of the type $\ce{...
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213 views

Can the compounds NOF3 and POF3 both exist?Why?

Today I came across a question (in one of my books) like Can the compounds $\ce{NOF3}$ and $\ce{POF3}$ both exist? Why? After some googling I found that both of them do indeed exist. I can ...
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317 views

What type of bond(s) are present in BH4 - ion?

In BH4- ion what bonds are present between Boron and Hydrogen? Is 3 covalent bonds are present between B and 3 H and other Hydrogen acts as an Hydrogen ion (H-) and forms coordinate bond with Boron ...
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43 views

Compounds forming between silicon gallium and nitrogen [closed]

What are the possible compounds that can form between silicon, gallium and nitrogen?
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123 views

Metallic bonding and covalent boding

Why do metallic bonds have delocalized electrons, whereas covalent bonds only share electrons? Does it have something to with the atomic masses of the individual non/metals or something else? I'm ...
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4k views

Intermolecular Forces for Ionic Compound?

So in class we have learned London dispersion, dipole-dipole, ion-dipole and hydrogen bonding for intermolecular forces. Our teacher always uses covalent molecules as examples. So I was wondering ...
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81 views

Why would phosphorus pentoxide be called 'phosphorus(v) oxide'?

There's a question in the chemistry textbook I use with my GCSE class which asks pupils to identify which of various compounds feature ionic bonding. One of the compounds is phosphorus(V) oxide, which ...
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562 views

Determine polarity of covalent bond with formal charge

In a covalent molecule, can we conclude that if the formal charge between two atoms are +1 and -1 respectively, then the chemical bond acting between them is a polar covalent bond (such as the bond ...
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Structures for NO+ (Nitrosonium)

There are two possible structures for Nitrosonium : In the first structure, there is a +1 Formal charge on Oxygen, whereas, In the second structure, there is a +1 Formal charge on Nitrogen. Q. ...
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102 views

Geometry of AsF5

Which of the following is the best description of the arragement of fluorine atoms around the arsenic atom in a molecule of AsF$_5$? (a) trigonal bipyramid (b) octahedron (c) tetrahedron (d) ...
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Number of co-ordinate (dative covalent) bonding

How can I calculate the number of co-ordinate (dative covalent) bonds in a molecule? For example, how many co-ordinate (dative covalent) bonds are there in $\ce{NO2+}$?
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21 views

Checking the possibility of a carbon compound [duplicate]

Is such a compound possible? Note, the carbon fulfils the tetra valency. If yes, then what will be it's IUPAC name? P.s. sorry, the image is rotated! Basically, all carbons are attached in a ...
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55 views

Name for HxOy compounds?

Is there a name for the class of stand alone molecules that contains oxygen, water, hydrogen peroxide, and ozone? ($\ce{O2}$, $\ce{H2O}$, $\ce{H2O2}$, $\ce{O3}$) I would not want to include hydroxyls $...
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Does the shared electron in Covalent bonds revolve around nucleus?

We know that electrons are charges that revolve around the nucleus. Then, when in covalent bonds the electron is shared; does the electron obey the rule?
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149 views

Covalent bonds other then 2-center, 2-electron bonds

I've heard of single bonds, double bonds, triple bonds, and quadruple bonds between two atoms, but in each of those bonds the two atoms contribute the same number of electrons from each of their ...
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Why the bond angle of PH3 is lesser that that of PF3?

We can explain why the bond angle of $\ce{NF3}$ (102°29') is lesser than $\ce{NH3}$ (107°48') by the VSEPR theory, since lone pair lone pair repulsion is greater than lone pair bond pair repulsion. ...
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776 views

Bond angles in BrF5

If in an octahedral structure there is one lone pair placed on any two of the axial position then will the lone pair distort all the 90 degree angles due to repulsion from lone pair or the angles will ...
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71 views

What is the correct structure for sulfur dioxide?

A question from the National Chemistry Olympiad (Germany-2008) goes as follows: Besides the composition of a substance the structure of its molecule or ion is of interest. To predict the structure ...
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1answer
64 views

Small doubt regarding bulkier molecule having more probabilty of reaction [closed]

I have heard a theory from someone and just wanted to confirm if its true or not. Is it true that more bulkier an organic compound is, more likely it is to react? So does this mean that higher the ...
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298 views

Is there any experimental evidence for OClF5?

On page 88 and 89 of this document, the author laments that $\ce{OClF5}$ has still not been discovered. He says it would be "just about the ultimate possible storable oxidizer" (for rockets). (Note: ...
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Why are noble metals more electronegative then most metals?

I was researching about electronegativity when I looked up what a graph of electronegativity within the periodic table is. And, this appeared. I scanned it, matching up everything I knew about the ...
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150 views

Why does different elements form different types of carbides?

What property of the elements makes them forms different types of carbides like: $\ce{Be}$ and $\ce{Al}$ - $\ce{Be2C}$ and $\ce{Al4C3}$ (Methanides) contains $\ce{C^4-}$ ion $\ce{Na}$ and $\ce{Ca}$ -...
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221 views

What is the structure of NO2-?

I know that NO2 has 3 effective pairs, so it is likely to have trigonal planar structure. In trigonal planar structure we usually see three atoms bonded to central atom at 120°. But in NO2-, I ...