what types of orbital overlap occur in cumulene?

what types of orbital overlap occur in cumulene?

what types of orbital overlap occur in cumulene?

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A cumulene is a hydrocarbon with three or more cumulative double bonds. They are analogous to allenes, only having a more extensive chain. The simplest molecule in this class is butatriene, which is also called simply cumulene.

The carbons on the ends are sp² hybridized, with a p-orbital for the ‘second’ bond in the double bond with their neighboring carbons.

They have those sp² orbitals overlapping with the s from the hydrogen, and they have a p overlapping in the pi bond with the neighboring carbon. They also have a sigma bond with the neighboring carbon I’ll get to.

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The middle carbons each have two pi bonds with their neighbors, leaving sp hybridiaztion for the rest. So they have sp/sp² with the end carbons, and sp/sp with each other. (And they also have p/p in the pi bonds).

what types of orbital overlap occur in cumulene?
what types of orbital overlap occur in cumulene?

What types of orbital overlap occur in cumulene?

Check all that apply.  

  • S/SP overlap
  • sp2/sp2 overlap
  • s/sp2 overlap
  • sp/sp overlap
  • s/s overlap
  • p/p overlap
  • sp/sp2 overlap
what types of orbital overlap occur in cumulene?
what types of orbital overlap occur in cumulene?

Answer

 The carbons on the closures are sp² hybridized, with a p-orbital for the ‘second’ bond in the twofold bond with their neighboring carbons. They have those sp² orbitals covering with the s from the hydrogen, and they have a p covering in the pi bond with the neighboring carbon.

Fundamentals

Hybridization: This is a term that describes the merging of orbitals in order to create hybrid orbitals capable of bonding.

The number of sigma bonds that are attached to an atom can explain the hybridization.

 

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