Which of these contain an sp hybridised carbon atom? 2,3-dichloropent -3-ene , ethyl butanoate , propanone

Question

Which of these contain an sp hybridised carbon atom? 2,3-dichloropent -3-ene , ethyl butanoate , propanone

Answer 1

I think

ethyl butanoate

not sure!!

Answer 2

None of these three compounds contains a triply bonded carbon atom: so no carbon is sp hybridised.

The only common compounds containing sp-hybridised carbons are alkynes (containing a carbon-carbon triple bond) and nitriles (cyanides) (containing a carbon-nitrogen triple bond.)

Answer 3

OK, I have drawn out the structures of each of these as you have written then and by my reckoning none of them have an sp hybridised Carbon. I am pretty sure of this.

An sp hybridised carbon is reconisable by its linear geometry, it will only be attached to TWO other atoms, either with one triple and one single bond or with two double bonds. None of these compounds has that.

It is possible that if you have made a typo in the first compound it could be this one, but as it is written it is not.

2,3-dichloro pent-3-ene

CH3 -CHCl-CCl=CH-CH3

The other two compounds are pretty straight forward and definately don't have sp hybridised carbons.

Ethyl butanoate

CH3-CH2-CH2-CO-O-CH2-CH3

propanone

CH3-CO-CH3