14.1 sigma and pi bonds HL Flashcards

1
Q

Covalent bonding definition in relation to atomic orbitals

A

Covalent bonds result from the overlap of atomic orbitals to form molecular orbitals

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2
Q

2 types of covalent bond

A

1) Sigma

2) Pi

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3
Q

What is sigma bond

A

A sigma bond (σ) is formed by the direct head-on/end-to-end overlap of atomic orbitals, resulting in electron density concentrated between the nuclei of the bonding atoms.

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4
Q

Possibilities of having sigma bond

A

1) 2 s orbitals overlapping head on
2) S orbital overlapping with p orbital , head on
3) 2 p-orbitals overlapping head on

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5
Q

What is pi- bond

A

A pi bond (π) is formed by the sideways overlap of atomic orbitals, resulting in electron density above and below the plane of the nuclei of the bonding atoms.

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