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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: xangelofxdeathx on March 31, 2007, 12:59:04 AM

Title: Need help on Hydrogen bonding question
Post by: xangelofxdeathx on March 31, 2007, 12:59:04 AM

Which species can form intermolecular hydrogen bonds with other molecules or ions of the same type?

1. HF
2. CH₃F
3. NH₄⁺

A) 1 only
B) 3 only
C) 1 and 3 only
D) 1,2 and 3

The answer is A, but more importantly can someone explain to me why CH₃F can't make a hydrogen bond?

I figured that since the structure has a C in the middle with 3 H and F on the outside, doesn't the F make a hydrogen bond with a H when CH₃F bonds with another CH₃F?

Title: Re: Need help on Hydrogen bonding question
Post by: Ahmed Abdullah on March 31, 2007, 07:25:21 AM

H bonded with F,O and N is able to make hydrogen bond with F,O or N where latter each has at least one lone pair electron. That's why hydrogen bond exist between HF molecules but there is no hydrogen bond between HCl, HBr, HI.