Michael asks…
Why does oxygen not take place in Hydrogen Bonding?
The two atoms in C-H bonds do not take part in hydrogen bonding. Why do oxygen, nitrogen, and fluorine participate in hydrogen bonding, but carbon does not?
admin answers:
Hydrogen bonding requires that hydrogen be present on a molecule and that the group the hydrogen hydrogen bonds to has at least one pair of nonbonding electrons. Oxygen, nitrogen and fluorine all have electron pairs available to hydrogen bond with the hydrogen atoms. Carbon, however, does not have an extra pair of electrons to bond with because all of the electrons of carbon are involved in bond formation.
If you are interested in going deeper into hydrogen bonding a good basic article on hydrogen bonding is found at the reference below.
Charles asks…
How does hydrogen bonding account for the shape of water crystals?
How are water crystals shaped? Why does hydrogen bonding account for this shaping?
Thank you.
xx
admin answers:
“Each water molecule is two hydrogen atoms bonded to one oxygen atom (H2O). Because of how the atoms share electrons, a water molecule is slightly positively charged at the hydrogen atoms, and slightly negatively charged at the oxygen atom. The molecule’s charged ends attract the oppositely charged ends of other water molecules (“hydrogen bonding”).
In liquid water, as molecules slip-slide past each other, bonds form, break, and re-form. But by the time water has cooled to 4 C., the molecules’ energy has dropped enough that they are very near one another. So each H2O molecule forms more stable hydrogen bonds, with up to four fellow molecules.
By 0 C. (32 F.), the H2O molecules are snappily lined up in a frozen crystal lattice, an open hexagonal (six-sided) shape. Unlike in liquid water, the molecules in ice are held rigidly apart. That means more empty space between molecules, so frozen water occupies more room.”
William asks…
What are three examples of substances that would be expected to exhibit hydrogen bonding in the liquid state?
What are three examples of substances that would be expected to exhibit hydrogen bonding in the liquid state?
admin answers:
H2O, NH3, CH3OH
Richard asks…
What’s the difference between “Hydrogen Bonding” and “Permanent dipole-dipole interactions”?
I have no idea what the difference between the two is! All i know is that, hydrogen bonding can only occur between Hydrogen and Fluorine, Chlorine and Oxygen and permanent dipole-dipole interactions occur in all polar molecules.
So..
1. Does Water (H2O) have Hydrogen Bonding or Permanent dipole-dipole interactions? It can’t have both because aren’t they the same thing?
2. Also, can molecules only be polar in liquids?
I’m so confused!
Thanks for your help! 
admin answers:
Permanent dipole dipole interaction is between polar molecules because of the charges attracting each other.
Hydrogen bonding with nitrogen as well. It doesn’t occur with chlorine.
1)Water is hydrogen bonding
2)No
Ruth asks…
How many of the following compounds will exhibit hydrogen bonding?
How many of the following compounds will exhibit hydrogen bonding?
CH3Cl, CCl4, CH3CH2OH, CH3OCH3, H2O
is it 1,2,3,4, or 5
admin answers:
Yea the answers below me are right. I just drew the lewis structures. And only 2 of them exhibit hydrogen bonding
Sandra asks…
Chemistry help PLEASE, In which of the following compounds hydrogen bonding is an important intermolecular for?
In which of the following compounds hydrogen bonding is an important intermolecular force?
H2O
HCN
PH3
CH3CH2OH
CH5N
Please I don’t get it! Just simply say incorrect or correct for each, please!
admin answers:
Incorrect
Incorrect
Incorrect
Incorrect
Incorrect
Boy, you really SUCK at chemistry.
Steven asks…
Which functional groups are capable of hydrogen bonding?
I know the elements nitrogen, flourine, and oxygen are the participants in hydrogen bonding. However, I was reading a problem and it stated that ether or ester was not capable of hydrogen bonding. Not sure if that meant that they are incapable of inter or intra-molecular hydrogen bonding. If someone could please list the groups that are part of this I would really appreciate it and also let me know if it is involved in intra, inter or both if possible. Thanks a lot!
admin answers:
NH, OH, SH can donate or receive a hydrogen bond. Fluorine and functional groups with C=O can receive a hydrogen bond.
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