Why is alkene more reactive than alkane?

Answer 1

because aldehyde has one Hydrogen attached to the C=O carbon where less steric hinderance is observed in comparison to ketone. Also, CH3 is an electron donating group where it stabilize an electron poor site but destabilize an electron rich site, hence, making the C=O carbon less electrophilic. When it is less electrophilic, the nucleophile is less likely to attack in a ketone than in aldehyde where a hydrogen is attached to the C=O carbon.

Answer 2

Though alkenes have more bond energy than alkanes they are comparatively less reactive. This is because in alkenes pi bonds are present in addition to sigma bonds and the presence of these pi bonds does not allow free movement of molecules. Hence a strain builds up in the alkene molecules which makes it more reactive

In alkenes pi bond is very weak bond so electrons of pi bond are more exposed to be attacked by an electrophile,both thesev factors make the alkenes more reactive.

Order of reactivity:

the order of reactivity in alkane,alkene and alkyne is as follows

alkenes>alkynes>alkanes

Answer 3

i think due to the presence of oh absence of OH groups in aldehydes they can not form hydrogen bonds with polar solvents, also in ketones having =O with alkyl groups less soluble. But in aldehydes the C=O is at the outmost C-atom(s) so it is more a-symetrically

Answer 4

Aldehyde group is present at the terminal of carbon chain so stearic hindrance (for attack on carbonyl carbon) is less as compare to ketones secondly aldehyde group is more polar than ketone due to attachment of hydrogen atom at one side.

Answer 5

Because in aldehyde there is at least one hydrogen atom bonded with carbon atom while in ketone there is no free hydrogen to make (-COOH).

Answer 6

alcohols are polar which means they will dissolve, however, alkanes aren't polar so they will not dissolve. I hope this helps

Answer 7

Because of the alkene's more 'energetic' C=C double bond(s).

Answer 8

Because it is. Just deal with it.

Answer 9

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