Thread: Formattion of hydrogen bond in water molecule

1)The oxygen's high electronegativity cause the shared pair of electron move a little toward oxygen atom.So,oxygen atom is partial negative and hydrogen is partial positive.The adjacent hydrogen atom in water molecule attract the oxygen atom because of electrostatic.

2)The oxygen's high electronegativity cause the shared pair of electron and HYDROGEN'S ELECTRON CLOUD move a little toward oxygen atom.So,hydrogen atom is strong positive.The hydrogen atom attract the lone pair of adjacent hydrogen atom in water molecule.

The two process is the information about the formation of hydrogen bond in water molecule.
So,what is true?Or..both wrong?Who can explain the formation of hydrogen bond?
The electronegativity is the ability of atom to attract the bonded pair...but the oxygen's high electronegativity cause the shared pair of electron and electron cloud?....High Elelctrongativity alos cauise atom to attract the electron cloud????

and i have some question:
the hydrogen bond is a type of dipole-dipole movement.Someones say the dipole-dipole movement is not related to lone pair of electron.but,the number of lone pair is related to the number of hydrogen bond.So wrong about this?hydrogen is not a dipole-dipole movement?

How the number of lone pair affect the number of hydrogen bond in a molecule?

I hope any physicist and chemist can help me...

Hydrogen bonding from Wikipedia.

http://en.wikipedia.org/wiki/Hydrogen_bond

Originally Posted by Geo

Hydrogen bonding from Wikipedia.

http://en.wikipedia.org/wiki/Hydrogen_bond

I have read that...but there are difference answer taht i searcher form other website..hope you can help me..

Originally Posted by ~James~

1)The oxygen's high electronegativity cause the shared pair of electron move a little toward oxygen atom.So,oxygen atom is partial negative and hydrogen is partial positive.The adjacent hydrogen atom in water molecule attract the oxygen atom because of electrostatic.

2)The oxygen's high electronegativity cause the shared pair of electron and HYDROGEN'S ELECTRON CLOUD move a little toward oxygen atom.So,hydrogen atom is strong positive.The hydrogen atom attract the lone pair of adjacent hydrogen atom in water molecule.

Hydrogen in bold should read oxygen, which means it's the same as no.1.

So,what is true?Or..both wrong?

Both 1. and 2., are the same and correct. I don't see what the difference is?

How the number of lone pair affect the number of hydrogen bond in a molecule?

With water, oxygen has two lone pairs, therefore one hydrogen goes to one lone pair and another hydrogen to the other pair. Each lone pair can form one hydrogen bond.

When your mentioning electronegativity, your dealing with intramolecular bonds. Hydrogen bonds are intermolecular.

By the way, we're talking about chemistry in the physics section. :P

:-D thank you for your answrr..
but hydrogen bond is a type of dipole-dipole..but dipole-dipole just related to electronegativity..but hydrogen is related to lone pair....what wrong about this?
A high electronegativity can attract the BONDING PAIR OF ELECTRON only..Can It(OXYGEN) attract the ELECTRON CLOUD(Hydrogen)

In fact,i want to know:
a)if the oxygen has no lone pair,can the hydrogen bond between the water molecule form?
b)if the oxygen has same electronegativity as hydrogen,can hydrogen between water molecule form?why?(Many people say yes...but i think..why cannot?the hydrogen can share its valence electron,,so the rear hydrogen atom has no electron..leave a positive charge nucleus.The positive charged then attract the lone pair of oxygen(adjacent water molecule)...why cannot?

Can anybody help me???

Now you've gone all hypothetical. :x