[SheffieldWednesday4ever]

Hey everyone,

my question is which is more stable, CH3-CH2-CH3 or CH2=CH-CH3?

I think the H in the propene is more willing to be given away because its conjugate base will be more stable as it has resonance. Thus, propane is more stable. But I'm kind of lost in this example.

Thanks for reading

[gfunk]

Are you asking which proton is more acidic - the alkane proton or the alkene proton?  And what do you mean by "stable"?  And are you referring to the neutral molecule or the conjugate base?

[SheffieldWednesday4ever]

Sorry,

In short, I'm asking which is a better acid.

[lmlh]

propane，the reason as you said

[a student]

but I think that propen is more acidic because the more s character the C-H bond the more acidity of that hydrogen for example as you know the acidity of alkynes is more than alkenes and they are more acidic than alkanes.

[PiBond]

Propene is more acidic.  Losing a proton results in a carbanion that can resonate.