Thank you for answer by Jubba and yggdrasil
Anyway, the order Alkyne>Alkane>Alkene make me
I read it from text book(but the author didn't mention about a clear reason). At first I agree with yggdrasil and new arrangement of order should be Alkyne>Alkene>Alkane.
I try to understand about saturation, if we order the boiling point following with saturation, So
Alkane(most saturation) >Alkyne>Alkene (most unsaturation)
Beacuse the compact structure of alkyne, so it is more influence than saturation and make more dispersion force and order will be
Alkyne>Alkane>Alkene
Is it make sense?
Please let me know
Oh Organic chemistry can make anyone mad..
Satha