Questions tagged [hydrogen-bond]
Intermolecular force between covalently bound hydrogen atom and atom possessing a lone pair of electrons.
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Which are stronger intermolecular forces: ionic bonds or hydrogen bonds? [closed]
Do strong ionically attracted molecules have stronger intermolecular forces than hydrogen bonding forces?
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How polarization effects from cations affect H-bond strength
The average hydrogen-bond strength in pure water is higher than the average H-bond strength between the first and second hydration shells around a $\ce{Al^3+}$ ion (or any cation, for that matter). ...
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It is easier to iron cotton clothes when slightly wet, why?
As the title says, why is it easier to iron cotton clothes when slightly damp ? Has this got something to do with the hydrogen bonding in cotton ?
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Specific Heat Capacity of Heavy Water
Water has an unusually high specific heat capacity due to it's hydrogen bonds.
Why is it that the change in isotope causes a 10% difference in the heat capacity? How does the added neutron in the ...
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How does a water molecule bond to an anhydrous salt to form a hydrate?
Some sites suggest that water molecules bong to anhydrous salt via a "loose bond". What does that even mean? $\ce{H2O}$ is a polar molecule and salts are made up of ionic bonds. Is it a hydrogen bond ...
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reference or data on internal hydrogen bond strength
As suggested by the title, I am looking for data on the strength of different internal hydrogen bond configurations. In general, an internal hydrogen bond may form when the donor and acceptor are ...
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Dichloromethane solubility in water
I heard dichloromethane is soluble in water 1:50, but I also heard it is not because it can't form hydrogen bonds. I'm confused. Is there a way to extract it? Would putting the water to $40~\mathrm{^\...
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Does alcohol hydrogen in the enol tautomer of a β-dicarbonyl have sp² character?
My reasoning for the somewhat implausible "$\mathrm{sp^2}$" character of the hydrogen between these two oxygens on the enol structure of the right comes from recognizing that if it were, then we would ...
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Is Hydrogen Bonding a Type of Dipole Dipole Interaction?
I understand that dipole dipole forces is due to the attraction of the different partials charges of atoms in different molecules due to their different electro-negativities.
For hydrogen bonding, ...
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Why does hydrogen fluoride have a boiling point so much lower than that of water?
$\ce{F}$ has more unshared electron pairs and is very electronegative, so $\ce{H}$ of another $\ce{HF}$ molecule can $\ce{H}$-bond with it.
$\ce{HF}$ has normal boiling point of $\pu{19.5^oC}$ while $...
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Hydrogen bonding
It is mentioned in my textbook:
"Hydrogen atoms of water molecule create strong electrical field due to their small sizes"
How is the size related to electrical field and its strength?
A little ...
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Why is the formation of double helix between non complementary sequences disfavoured?
The textbooks starts with the phenomena that double helix is an expression of the rules of chemistry.
Hydrogen bonds are important in determining the formation of specific
base pairs in the ...
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Physical significance of double-well potential in quantum bonding
I'm currently studying about the hydrogen bond's Potential Energy Surface (PES) pattern.
As per literature, single point energy obtained from Density Functional Theory (DFT) using MP2 approximation ...
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Hydration number: Carbonic acid in water
Carbonic acid ($\ce{H2CO3}$) is known to be soluble in water, and that this particular compound is unstable, so much so that according to the 2014 article from Berkeley Lab:
New Insights on Carbonic ...
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Electronic density distribution in hydrogen bond
I'm currently studying about the atomic configuration of electrostatic interactions. Concept is there that in case of interactions like in N-H...N-H (amides), the stability depends on the position of ...
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