A covalent compounds which form covalent bonds between non metal atoms, which combine together by sharing electrons. Covalent compounds have no free electrons and no ions so they don't conduct electricity.

learn more… | top users | synonyms

3
votes
1answer
36 views

Noble gas fluorides

According to WebElements, of the Noble Gases, $\ce{He}$, $\ce{Ne}$ and $\ce{Ar}$ do not react with any of the halogens; however: $\ce{KrF2}$ can be synthesised at low temperatures. Xenon can react ...
7
votes
2answers
431 views

How come there aren't any silicon analogs of alkenes or alkynes?

We know that there are silicon analogs of alkanes, but according to Wikipedia, silicon analogs of alkenes or alkynes are virtually unknown. How come?
1
vote
0answers
24 views

What makes a metal more inclined to bond covalently? [duplicate]

Many metals form compounds with s-block elements that are essentially entirely ionic. However, elements like silver, copper, lithium and so on, can form bonds that are significantly covalent in ...
0
votes
1answer
21 views

Can covalently bonded hydrocarbons be influenced by a magnetic field?

I am doing a University project on Magnetically Assisted Combustion and am curious to know more about how magnetic fields may or may not affect gases such as butane and propane. I think I am right ...
3
votes
0answers
46 views

Why does Silver form bonds with covalent character?

Compounds of silver form particularly strong bonds which is accounted for by the significant covalent character of the bonding. Furthermore, is the tendency to form covalent bonds linked to the fact ...
1
vote
1answer
110 views

find percentage ionic character if electronegativity is given

Lets say that a in a compound A-B, electronegativity of A is x and that of B is y,what will be the percentage ionic character in terms of x and y? I have been taught that the percentage ionic ...
1
vote
0answers
25 views

Am I right in giving the following reason for some questions relating to the p-block?

I'm seeking clarification as I believe this to be the answer to why boron compounds are electron deficient. While bonding, the $2s^2$ electrons of Boron are excited to the $2p_y$ orbital, they ...
0
votes
1answer
29 views

Build the geometric structure of SnBr2

What is Sn valence in this case? Because it depends on it if it will be linear or tetragonal.I'm talking about a molecule.
3
votes
1answer
89 views

How to know it when I see a covalent network?

This is a well-known (better said: well-discussed) question in the internet. When you look for answers for popular questions, you usually see them with a variable degree of reliability and complexity. ...
1
vote
2answers
38 views

Comparing the nature of ionic compounds

I want to know how to compare the strength or stability of ionic compounds. Example : $\ce{Mg(HCO3)2}$ and $\ce{NaHCO3}$ I know that polarity and polarizability affect the ionic and covalent nature.
4
votes
2answers
252 views

Why does SnCl2 occur despite the octet rule?

Shouldn't reaching an octet be any atom's "goal"? However, I've recently learned about cases that are either expanding octets, or have lesser than "enough" electrons for an octet abiding. e.g.: S in ...
1
vote
2answers
509 views

Why do simple molecular substances have weak intermolecular forces and why do giant covalent substances have strong intermolecular forces?

Why do simple molecular substances have weak intermolecular forces and why do giant covalent substances have strong intermolecular forces? I understand that in simple molecular substances the atoms ...
1
vote
1answer
53 views

What is a covalent semiconductor?

Aren't all semiconductors' atoms bond in a covalent bond? How is a "covalent semiconductor" different from other semiconductors?
2
votes
1answer
105 views

Where does the energy of formation of covalent bonds come from?

Consider two $\ce{H}$ atoms. Since the proton in one attracts the electron in another, they attract each other, and form a covalent bond ($\ce{H}-\ce{H}$). Bond forming requires energy (436 kJ/mol for ...
1
vote
2answers
93 views

The difference between peptide bonds and the bonds between polypeptides?

I was doing some tests for the multiple-choice final we've got ahead. And it was on me to count the peptide bonds in an Insulin hormone with 51 aminoacids arranged in two polypeptides with 30 and 21 ...
2
votes
1answer
299 views

Why doesn't nitric acid have a positive charge?

From the diagrams I've seen $\ce{HNO3}$ has a dative covalent bond so why doesn't it have a positive charge?
3
votes
1answer
725 views

Is a C-F bond stronger than a C-Cl bond?

In hydrolysis/nucleophilic substitution of haloalkanes, the bond enthalpy indicates the rate of hydrolysis (e.g. the $\ce {C-I}$ bond is weaker than the $\ce {C-Cl}$ bond so in hydrolysis the alkane ...
1
vote
1answer
37 views

Determine which orbitals will form hybrids with one another

I've been teaching myself chemistry, so any help is greatly appreciated. I've been reading an online tutorial that claims the two orbitals that merge in Aluminum trihydride are 1 orbital of 2s and 2 ...
2
votes
3answers
427 views

Why is PbCl₄ covalent?

My answer: The inert pair effect in $\ce{Pb}$ causes it to pull back the electrons, resulting in polarisation. My teacher's answer: An ionisation state of $+4$ is too difficult to achieve, and it is ...
1
vote
1answer
91 views

How do we experimentally know the strength of bonds?

How do we experimentally measure the strengths of covalent versus ionic bonds? Also, for a given molecule, how can we know if two pairs of atoms is covalently or ionically bound? Related question: ...
6
votes
1answer
2k views

Why can't carbon form an ionic bond?

My textbook says that a $\ce{C^{4+}}$ cation cannot be formed because it requires a lot of energy to remove 4 electrons. Formation of ionic bonds involve "removing" electrons and there seems to be ...
2
votes
2answers
510 views

Why do acids ionize in solution if they are covalently bonded?

Maybe I am wrong, but I thought acids were covalently bonded since hydrogen doesn't form ionic compounds. For example, wouldn't $\ce{HCl}$ look like: Since the electrons are shared, why does it ...
7
votes
5answers
537 views

Metal Compounds that bond covalently

I would like to ask if anyone has a list or knows which covalent compounds have metals in them. For example, beryllium and aluminium are both metals but they bond covalently with chlorine to form ...
2
votes
2answers
125 views

Why is the ionization energy for Hydrogen non-zero?

There are no other electrons to collide, repel and kick Hydrogen's single electron to a distant nucleus. And that a single electron is tightly attracted to the nucleus by the electrostatic energy ...
2
votes
1answer
4k views

Why is the bond in HF ionic while it is covalent in HCl?

Why would a hydrogen atom "donate" to Fluorine in an ionic bond but not in $\ce{HCl}$? Why would $\ce{H}$ and Chlorine share instead of $\ce{Cl}$ just stripping it away like $\ce{F}$ does?
4
votes
1answer
216 views

Which d orbitals of sulphur take part in the pi bonds of SO3?

In $\ce{SO3}$, 2 $p\pi-d\pi$ bonds are present. But which $d$ orbitals of sulphur take part in these $\pi$ bonds? The answer says $d_{xy}$ and $d_{yz}$. Someone also told me that crystal field ...
9
votes
1answer
323 views

Is BCl₅ possible?

Is $\ce{BCl5}$ possible? I saw it in book. As far as we can see there is no way to get 5 chlorine atoms with boron.
0
votes
1answer
88 views

Determining covalent bond strengths without hybridisation

Assuming pure $\ce{2s}$ and $\ce{2p}$ orbitals of carbon are used in forming $\ce{CH4}$ molecule, which of the following statements is false? (single choice question) Three $\ce{C-H}$ bonds ...
1
vote
1answer
842 views

Why is Aluminium Chloride a Lewis Acid if it's an ionic compound?

In my textbook it says in the reaction $\ce{AlCl3 + Cl- -> AlCl4-}$, Aluminium Chloride ($\ce{AlCl3}$) has six valence electrons and accepts a lone pair from $\ce{Cl-}$, but wouldn't that mean the ...
3
votes
1answer
373 views

How can sulphur 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 sulphur or ...
1
vote
2answers
191 views

Binary Molecular Compounds of Nonmetals

How does one determine the formula for two non metal elements? Such as Nitrogen and Oxygen. I look at the charges with Nitrogen having -3 and Oxygen having -2. How would I get to zero? How do you ...
5
votes
3answers
2k views

Bonding in the phosphate ion

I'm looking for an explanation of the bonding in the phosphate (PO43−) ion: (Image courtesy of Wikipedia) Phosphorus (15P) - being the fifteenth element - has fifteen electrons, five valence ...
1
vote
1answer
75 views

Why is silicon oxide giant covalent structure?

Why is silicon oxide giant covalent structure? Why it doesn't bond like carbon dioxide? Thank you
8
votes
4answers
6k views

Are metallic/ionic bonds weaker than covalent bonds? I was taught the opposite. Now I'm confused

In mineralogy class, I was taught that metallic and ionic bonds are weaker than covalent bonds and that's why quartz and diamond have such a high hardness value. However, in organic chemistry class, I ...
11
votes
4answers
3k views

Bond Length of CO+ is expected to be more than CO but it is found to be less. Why is this so?

According to Molecular Orbital Theory(MOT), the bond order of CO is 3. When CO+ is formed, bond order decreases to 2.5 and thus bond length should increase. However, the bond length of CO+ is found to ...
7
votes
3answers
4k views

The Crisscross method for finding the chemical formula

I am reading this wikipedia article that I don't understand. What I don't understand is: suppose we have two elements $X$ and $Y$ having oxidation numbers $x$ and $y$ respectively. Can we prove ...
2
votes
1answer
379 views

How would one compare the magnitude of covalent character between SnCl4 and SnF2 using Fajan's Rules?

It is easy to compare two ionic compounds when one of the ions is same. However, how do we compare two compounds if one of the ions is the same element but just has different charge and the other ion ...
1
vote
2answers
208 views

What are pharmaceutical uses for Vanillin?

What are some pharmaceutics that use vanillin? Is vanillin just an aroma and taste agent to pharmaceutics?
6
votes
1answer
648 views

Is pyrite (FeS₂) an ionic or a covalent compound?

I have searched all over the web and found a lot of diverse explanations, but none of them are concluding exactly whether $\ce{FeS2}$ (solid - pyrite) is a covalent or an ionic compound. From ...
2
votes
2answers
71 views

Chemical Bonding

A Covalent bond involves overlapping of orbitals while an Ionic bond involves charge separation. Why is overlapping of orbitals less stronger than charge separation,i.e., why is an Ionic bond stronger ...
2
votes
1answer
30 views

Quantum Valence Theory Reference

At least to me, the contents of chapters 5 & 6 given here are representative of discussions on chemical bonding given in nearly all intro general & organic chem books, the statements in those ...
2
votes
1answer
2k views

Why do ionic compounds dissociate whereas coordinate complex's won't?

An ionic bond is the bonding between a non-metal and a metal, that occurs when charged atoms (ions) attract after one loses one or more of its electrons,and gives it to the other molecule, for ...
8
votes
1answer
294 views

Covalent bond deformation

When do covalent bonds of a molecule $M$ extend or compress while no bonds in $M$ are broken? I can conceive of some possibilities but I don't know how common they are: Temperature changes ...
0
votes
1answer
272 views

Chemical bond-covalent-valence electrons OH-

I would like to ask how many valence electrons took part in creating chemical bond in $\ce{OH-}$? Is the minus related to $\ce{O}$ or to $\ce{H}$? Are there any spare valence electrons which didnt ...
2
votes
1answer
40 views

Non-stoichometric compounds

I am looking for references (review articles, reports) about non-stoichometric compounds. Any idea of where should I look?
0
votes
1answer
68 views

Hydrogen ozonide existence

Does the hydrogen ozonide exist? I mean if this compound could be found in Nature $$HO_3$$ I am interested in the theoretical or phenomenological of such a chemical compound...
1
vote
1answer
923 views

How can the Bonding in IF7 be explained using LCAO method?

I know that the VSEPR theory explains $IF_7$ (iodine heptafluoride)'s structure as a pentagonal bipyramidal one.The valence bond theory can be used to say that it has $sp^3d^3$ hybridisation(i think ...
1
vote
1answer
1k views

Sulfur trioxide - vacant d-orbitals

Sulfur trioxide violates the octet rule. Upon drawing the Lewis dot structure for sulfur trioxide, we see that the central sulfur atom is bonded to three other oxygen atoms by double covalent bonds. ...
2
votes
1answer
819 views

Beryllium chloride - Highly hydrolysable?

Beryllium chloride's geometric structure is linear, with a bond angle of 180 degrees. Drawing the Lewis dot structure for this covalent compound, one can see that the compound is electron deficient ...
1
vote
3answers
306 views

Negative charge of methoxide anion

Why is the methoxide ($\ce{CH_{3}O^{-}}$) anion negatively charged? It has 13 valence electrons and has 13 free electrons. In spite of that the methoxide anion is negatively charged.