20 posts • Page 1 of 1
The difference in electronegativity between the hydrogen and the carbon is not enough to give the hydrogen a significant partial positive charge, so it is not attracted to the lone pair electrons on other oxygen, nitrogen, or fluorine atoms. Hydrogens attached to carbons mainly only have induced dipole -induced dipole interactions, unless the molecule is polar, in which case dipole dipole interactions may also occur.
Hope this helps!
Hope this helps!
Carbon and hydrogen have very similar electronegativities so when they are bonded together it is non polar. This means that their is no partial charges and it is these partial charges that cause hydrogen bonding to occur.
Their electronegativities are too similar. Because hydrogen bonds are formed from electron via a difference in electronegativity, it won't happen when a hydrogen and a carbon are near each other that level of pulling does not occur.
Hydrogen bonding is a result of a hydrogen atom bonding to a very electronegative atom (F, N, O). Hydrogen would be unable to form a hydrogen bond with carbon because their electronegativity values are too close/similar.
Carbon and Hydrogen have similar electronegativities, and thus, have a small electronegativity difference. However, since Fluorine, Oxygen, and NItrogen are more electronegative than Carbon, there is a greater electronegativity difference. This is why hydrogen bonds are only present in bonds with Nitrogen, Fluorine, and Oxygen.
Hydrogen bonding is a consequence of a hydrogen atom bonding to a very electronegative atom specifically F, N, O. Hydrogen is able to form a hydrogen bond with these atoms because the difference in electronegativity is large enough unlike it is with carbon. The small difference between the hydrogen and the carbon is not enough to give the hydrogen a significant partial positive charge, so it is not attracted to the lone pair electrons.
N,O, and F are much more electronegative than Carbon, meaning when they are bonded to the hydrogen there is less of a dipole moment since the carbon is not as electronegative, therefore not allowing hydrogen bonds to form.
The hydrogen bond relies partially on a partial positive charge on the hydrogen. When the H is attached to a carbon, there is very little polarity and the partial charge on hydrogen isn't there to bond to the partial negative on the bonding atom.
It results from the attractive force between a hydrogen atom covalently bonded to a very electronegative atom such as a N, O, or F atom and another very electronegative atom. Carbon is not electronegative enough to form a hydrogen bond.
Who is online
Users browsing this forum: No registered users and 1 guest