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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  

Answer “What types of orbital overlap occur in cumulene?”

Concepts

The orbital overlapping concept can be used to explain the concept of bonding between atoms within molecules. These overlaps can be divided into two types according to the orientation of orbitals within the atoms.

1. End-on-end overlaps, gives a strong sigma (σ) bond
2. Side-ways overlaps results in the formation of (π) bond; these overlaps are named after their orbitals.

Fundamentals

Hybridization: Hybridization refers to the process of combining individual orbitals in order to create hybrid orbitals capable of bonding.

Hybridization of an atom can be explained by the number of sigma bonds attached to that atom.

Consider carbon atoms in its various hybridized state as shown below:

The number of sigma bonds attached to the atom	Hybridization	The remaining unhybridized p-orbital in the atom
2	sp	2
3	sp2	1
4	sp3	0

B

The structure of the cumulene is shown below.

The given structure clearly shows that there are two types of carbon atoms depending on the hybridization. The inner carbons have sp hybridization, while the terminal carbons have sp ² hybridization.

The given compound structure is shown below.

It is evident from the structure that there are 4 types

1. sp² −s overlaps.
2. sp² −sp overlaps.
3. sp² −sp overlaps.
4. p−p overlaps.

Answer: Part B

The Orbital-overlap occurred in cumulene is shown below.

Last words

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