Halogens and C-H bond strength

[Maverick56]

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Halogens, once on an alkane, increase the C-H bond strength.
Why?

Does this have something to do with the inductive electron-withdrawing of the halogen?
How does this make the C-H bond strength increase? How does this effect acidity too? like in X-CH3 or X-CH2-CH3 etc

 

[athockey7]

halogens are electron withdrawing groups so they stabilize the alkane bond. if the halogen were on a double bond then it would destabilize it.


if you had a methyl group on an alkane since it is elctron donating it makes it less stable.
if the methyl was on an alkene, since it is electron donating it makes it more stable.

adding a halogen to an alkane makes it more acidic because it allows the H on the C to taken away easier i think...not sure on this.