Hydrogen Bonds
Moderators: Chem_Mod, Chem_Admin
-
- Posts: 104
- Joined: Wed Sep 30, 2020 9:36 pm
Hydrogen Bonds
In determining hydrogen bonds, in addition to bonding with N, O, and F, is a hydrogen atom bonding with another hydrogen atom considered a hydrogen bond?
-
- Posts: 108
- Joined: Wed Sep 30, 2020 9:48 pm
- Been upvoted: 1 time
Re: Hydrogen Bonds
No, the hydrogen bond is between the N/O/F that the hydrogen must be bonded to and another N/O/F that has a pair of electrons to form the bond. The H will always have a slight positive charge in this case, so the hydrogen bonds will always include a H and a nitrogen, oxygen, or fluorine atom.
-
- Posts: 105
- Joined: Wed Sep 30, 2020 9:31 pm
Re: Hydrogen Bonds
No. This is because in order for a hydrogen bond to take place the hydrogen atoms in a molecule need to exhibit a slightly positive charge, so they can be attracted to the slightly negative N,O, or F. This means that the hydrogen atoms will repel each other and therefore cannot hydrogen bond.
-
- Posts: 111
- Joined: Wed Sep 30, 2020 9:39 pm
- Been upvoted: 3 times
Re: Hydrogen Bonds
No; Hydrogen bonding occurs because hydrogen is "electropositive", or only slightly electronegative. N, O, and F are highly electronegative, and thus attract hydrogen. Hydrogen doesn't have enough strength to attract other hydrogens' electrons if they are already separately bonded
-
- Posts: 102
- Joined: Wed Sep 30, 2020 9:41 pm
Re: Hydrogen Bonds
An H-atom must be attracted to N, O, or F in order to call it a hydrogen bond. If an H-atom of a molecule is attracted to an H-atom of another molecule, then it is not considered an H-bond. In fact, hydrogens generally are not attracted to each other since usually H atoms are both partially positive within their molecules, and therefore two partial positive molecules would not be attracted to each other.
-
- Posts: 143
- Joined: Wed Sep 30, 2020 10:02 pm
Re: Hydrogen Bonds
No a hydrogen bonding with another hydrogen is not considered hydrogen bonding. This type of interaction is also not favorable since hydrogen would be delta positive so two delta positive atoms would not be attracted to one another.
-
- Posts: 55
- Joined: Wed Sep 30, 2020 9:34 pm
Re: Hydrogen Bonds
So to clarify, in conclusion, a hydrogen bond only exist between H and an N, O, or F molecule? H bonds are polar correct? Because the H is attracted to a more electronegative atom?
-
- Posts: 104
- Joined: Wed Sep 30, 2020 9:53 pm
Re: Hydrogen Bonds
The H in a hydrogen bond must be bonded to a very electronegative atom(like O) to make sure it has a slight positive charge
-
- Posts: 100
- Joined: Wed Sep 30, 2020 9:49 pm
Re: Hydrogen Bonds
Melanie Krahn 1C wrote:So to clarify, in conclusion, a hydrogen bond only exist between H and an N, O, or F molecule? H bonds are polar correct? Because the H is attracted to a more electronegative atom?
Hi! I believe that hydrogen bonds exist between a hydrogen atom (covalently bonded specifically to F/O/N within the molecule) and another molecule's electromagnetic atom that has an available lone pair. Thus, I believe we could classify the covalent bond that the hydrogen atom experiences intramolecularly as “polar,” but I don’t think we classify the hydrogen bond itself as a polar bond, because it is an intermolecular force of attraction, not a covalent bond. Hope this makes sense!
-
- Posts: 104
- Joined: Wed Sep 30, 2020 9:54 pm
Re: Hydrogen Bonds
Hi, unfortunately, that would not be a hydrogen bond. The H would have to be bonded to a highly electronegative atom like N, O, and F.
-
- Posts: 97
- Joined: Wed Sep 30, 2020 9:47 pm
Re: Hydrogen Bonds
No a hydrogen bond would take place between a hydrogen atom and an atom such as Oxygen, which is highly electronegative.
-
- Posts: 50
- Joined: Tue Oct 06, 2020 12:17 am
Re: Hydrogen Bonds
The h-h bond will not be considered a hydrogen bond. A hydrogen bond will be attracted to electronegative elements such as F,O, and N
-
- Posts: 49
- Joined: Wed Sep 30, 2020 9:31 pm
Re: Hydrogen Bonds
Hydrogen bonds are attractive to D,o, and N therefore h-h bond will not a hydrogen bond.
Re: Hydrogen Bonds
No. This is because a hydrogen bond only forms between hydrogen and the N/O/F because H need to have a slight positive charge and the other atom will ave slightly negative charge. If two hydrogen bond together, then no electronegativity difference will be shown, thus showing no slight charge and no hydrogen bond.
-
- Posts: 105
- Joined: Wed Sep 30, 2020 9:50 pm
-
- Posts: 96
- Joined: Wed Sep 30, 2020 9:36 pm
-
- Posts: 51
- Joined: Fri Sep 24, 2021 5:33 am
Re: Hydrogen Bonds
No. A hydrogen bond must be formed between a hydrogen atom and another hydrogen atom that is directly paired with an atom with high electronegativity like N/O/F.
Return to “Bond Lengths & Energies”
Who is online
Users browsing this forum: No registered users and 10 guests