Questions tagged [hydrogen-bond]
Intermolecular force between covalently bound hydrogen atom and atom possessing a lone pair of electrons.
265
questions
0
votes
0
answers
667
views
Are hydrogen bonds between two hydroxyl groups stronger if one is deprotonated?
Hydrogen bonds can form between two hydroxyl groups. Is the hydrogen bond stronger if one of the groups is deprotonated?
- 45
1
vote
0
answers
261
views
Do CHF3 and acetone form a hydrogen bond?
I haven't been able to find a reference confirming that fluoroform forms hydrogen bonds with acetone. Do they?
- 55
2
votes
1
answer
774
views
What is the reason for the boiling point of benzene-1,4-diol being higher than that of benzene-1,3-diol?
What is the reason for the boiling point of benzene-1,4-diol being higher than that of benzene-1,3-diol?
Both have hydrogen bonds. I think it is due to quinol's symmetry but can't point out exactly ...
- 363
0
votes
1
answer
345
views
Hydrogen Bonding in case of nitro group [closed]
In many different cases of Nitro group I have seen that only one oxygen atom is particularly used for hydrogen bonding but not the other one.But I guess both the bonds should be polar and hence show ...
1
vote
2
answers
184
views
Hydrogen Bond Length and Lattice Density [closed]
The subject of the density of solid water is discussed on Physics Stack Exchange in this post.
In the post, it is said that..
the way the molecule is angled ensures that a specific (energetically
...
4
votes
0
answers
104
views
Would the hydrogen-bonded polymer hexaamminecobalt(III) hexakis(trifluoromethyl)cobaltate(III) be soluble in water?
It is clear that both the hexaamminecobalt(III) ion and the hexakis(trifluoromethyl)cobaltate(III) ion are both low spin (the former is already low spin, and the trifluoromethyl ligand is clearly ...
- 725
8
votes
1
answer
1k
views
Does ammonia exhibit hydrogen bonding in its gaseous state?
I was reading the properties of ammonia in my book (NCERT Chemistry Part I, Textbook for Class XII)
where it was written :
In the solid and liquid states, it (ammonia) is associated through hydrogen ...
- 393
8
votes
1
answer
242
views
Out of tropolone and tropone, which is more soluble in water?
According to me tropolone has intramolecular H-bonding, so extent of H-bonding with water will decrease and thus, will be less soluble.
Tropone (Cyclohepta-2,4,6-trien-1-one):
Tropolone (2-...
- 89
3
votes
1
answer
432
views
Which compound of these following have electrovalent, covalent, coordinate as well as hydrogen bond?
Which compound have electrovalent, covalent, coordinate as well as
hydrogen bond ?
A) $\ce{[Cu(H2O)4]SO4.H2O}$
B) $\ce{[Zn(H2O)6]SO4.H2O}$
C) $\ce{[Fe(H2O)6]SO4.H2O}$
D) $\ce{[Fe(H2O)6]Cl3}$
Answer ...
- 1,409
12
votes
2
answers
2k
views
Why hydrogen bonding in some acids make them a stronger acid when it is present even before deprotonation?
If we take the example of salicylic acid, hydrogen bonding is present in the acid as follows:
Even after deprotonation, it has intramolecular hydrogen bonding as follows:
My question:
p-...
- 452
4
votes
1
answer
3k
views
Why is Maleic Acid more soluble in water than its trans isomer Fumaric Acid?
My teacher taught me that compounds having intramolecular H-Bonding are relatively less soluble in water as they will not involve in H-Bonding with water appreciably while those able to do ...
1
vote
0
answers
99
views
Comparing the boiling points of common organic molecules
The order I was provided with is(comparing molecules of similar molecular mass from each);
alkanes< ethers< esters< aldehydes< ketones<< alcohols<< carboxylic acids<< ...
- 1,134
0
votes
1
answer
130
views
Which of the following compounds possess more than one percent enol content? [closed]
Which of the following compounds possess more than one percent enol content?
I understood that stability of enols are dependent on the hydrogen bonding in the compounds. But here, what is the ...
2
votes
1
answer
210
views
What happens when hydrogen bonds stretch?
I'm researching about the Mpemba effect and I came across an explanation saying that the effect occurs because at higher temperatures, the hydrogen bonds between the water molecules stretch and store ...
- 134
1
vote
1
answer
335
views
How do point mutations affect complementary base-pairing and widths of the nucleotide pairs?
Point mutations are divided into two categories: transitions and transversions. Since point mutations only occur during DNA replication (an integral process of both mitosis and meiosis), the mutated ...
- 99
0
votes
1
answer
60
views
How to interpret this formula about hydrogen bond energy
I want to evaluate some chemistry related formulas, which I don't understand.
In proteins, hydrogen bonding often occurs between the oxo group = O oxygen of one amino acid and the α-amino group (N − H)...
- 101
2
votes
0
answers
43
views
Why are Hydrogen bonds directional? [duplicate]
While reading about Hydrogen bonding in a book (O.P. Tandon's G.R.B. Organic Chemistry), I came across a sentence that was mentioned in a rather unstructured way relative to how comprehensive I was ...
- 471
0
votes
1
answer
1k
views
Why is boiling point of Ammonia greater than Arsine?
I have previously read that the boiling point of Stibane(SbH3) is greater than Ammonia(NH3) as ammonia is gas at room temperature and no hydrogen bonding exists in the gaseous form of NH3.
Hence, as ...
-3
votes
1
answer
548
views
Is "Hydrogen Bonding" coordinate covalent bond? [closed]
My textbook says:
The Oxygen atom of other molecules links to form coordinate covalent
bond with H-atom using lone pair.
Now I am confused. Is H-bonding coordinate covalent bond?
0
votes
1
answer
1k
views
How is o-Fluorophenol more acidic than phenol even after having Hydrogen bonding?
Source: Concepts of Organic Chemistry by Dr OP Tandon, Himanshu Pandey, Dr AK Virmani
Page no: 241
0
votes
2
answers
2k
views
Why does hydrogen bonding require a lone pair? [closed]
Why does hydrogen bonding require a lone pair of electrons on the partially negative atom? They would still be partially negative even without the lone pair right? Or does a bond exist, but is much ...
- 149
3
votes
0
answers
86
views
Why ethyl cyanide and propanol have the same boiling point?
As I understand, the intermolecular forces of ethyl cyanide are of van der Waals nature (dipole-dipole) but in the propanol molecule there are hydrogen bonds which are in principle much stronger. Why ...
- 201
1
vote
0
answers
132
views
Hydrogen bonding in acetylene and other terminal alkynes
My textbook says that hydrogen bonding is possible only when there is acidic hydrogen connected to an electronegative atom like $\ce{N}$, $\ce{O}$ or $\ce{F}$ and a basic lone pair of electrons on ...
- 168
-1
votes
1
answer
892
views
Why is Bonding between H and Cl not considered as H bonding? [duplicate]
Cl is an electronegative element and hydrogen is electropositive. Why are intermolecular interactions involving H and Cl not considered as H bonding? I read it in a book but there was no reason given ...
- 412
0
votes
1
answer
118
views
Effect of isotopes on H-Bonding
The following question was asked in one of the assignments my teacher has given.
Acetone ($\ce{Me2CO^16}$) on treatment with $\ce{H2O^18}$ gives a mixture of $\ce{Me2CO^16}$ and $\ce{Me2CO^18}$, the
...
- 1,411
0
votes
1
answer
527
views
Compare the boiling points of isobutane and 1-butyne
Question: Compare between the boiling points of isobutane and 1-butyne
The answer to this question is given as 1-butyne has higher boiling point than isobutane.
My approach: I have been taught a few ...
- 197
2
votes
1
answer
1k
views
Relative strength of intermolecular forces [duplicate]
My attempt at a solution:
First I look for hydrogen bonds:
The only compounds with hydrogen bonds are the second and fourth ones, so they have the strongest intermolecular forces. The second must have ...
- 23
2
votes
1
answer
69
views
Hydrogen bonding in sugar acids
I recently learnt that the reason for low solubility of mucic acid as compared to glucaric acid was more hydrogen bonding in the crystal state of mucic acid as compared to glucaric acid.
I would ...
- 103
0
votes
0
answers
64
views
Why isn't there a hydrogen bond present between the oxygen atom and hydrogen atom of adjacent alcohol groups?
*I know that there is inter-molecular hydrogen bonding between the molecules of glycerol.
*What makes the adjacent alcohol groups behave differently towards each other as compared to when they ...
- 41
1
vote
1
answer
157
views
Why don't dicarboxylic acids show hydrogen bonding in spite of the fact that carboxylic acids exist usually as dimers in polar aprotic solvent? [closed]
I have seen several examples:
The fact that maleic acid is more soluble in water than fumaric acid in spite of the fact that it must be able to show intramolecular hydrogen bonding.
trans-...
- 19