[Winga]

Q.1
The attraction between the partial +ve H of chloroform and the lone pair of carbonyl oxygen of ester is a hydrogen bond or not?

Q.2
Hydrogen fluoride, HF forms H-bond by the attraction between H of one HF molecule and F of another HF molecule.
Then, what kinds of bond between H and F of same molecule?

[Donaldson Tan]

Q1. no, because the H from chloroform is not bonded to F, O or N.

Q2. covalent bond

[Mitch]

Q.1
The attraction between the partial +ve H of chloroform and the lone pair of carbonyl oxygen of ester is a hydrogen bond or not?

Yes, but the correct answer is no.

[Winga]

For Q.1,
From one of the AL reference books, it mentions that this bonding is H-bond, so I just want to make sure it.


For Q.2,
Obviously, it is a covalent bond theoretically, but how can we distinguish which one is covalent bond or hydrogen bond in pure HF liquid?

Are they all the bonds between all H and F atoms are identical (thereoretically)?

[Winga]

For Q.2

I mean to which F- ion does H+ belong to?

[arnyk]

Between H+ and F- in a molecule it is covalent (polarish).  Between HF molecules I would say partial electrostatic differences like in water.

[Winga]

For Q.1, if the strength of dipole-dipole interaction is as strong as H-bond, is it still called Van der Waal's force?