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Sigma and Pi Bonds

The extent of...

Question

The extent of overlap of bonding orbitals is directly proportional to ________.

A

bond strength

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B

bond angle

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C

number of electrons shared

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D

bond polarity

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Solution

The correct option is A bond strength
The strength of the covalent bond depends on the extent of overlapping of bonding orbitals. If the extent of overlap between bonding orbitals is more, the bond will be stronger.

The extent of overlap is more for axial overlap than lateral overlap of orbitals. Therefore, sigma bonds formed due to axial overlap are stronger than pi bonds formed due to sidewise overlap.

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Similar questions

Q. According to VBT any covalent bond will be formed by overlapping of valence atomic orbitals of bonded atoms provided atomic orbitals must be half–filled and electrons be in opposite spin.
According to type of overlapping covalent bonds can be classified as: (a)

σ

π

δ

bond.
The combination of orbital that cannot produce non–bonding molecular orbital is:
(internuclear axis is z–axis)

Q. Assertion :Sigma bond is stronger than pi bond. Reason: The strength of a bond depends on the extent of overlapping.

Q. According to VBT any covalent bond will be formed by overlapping of valence atomic orbitals of bonded atoms provided atomic orbitals must be half–filled and electrons be in opposite spin. According to type of overlapping covalent bonds can be classified as: (a)

σ

π

δ

F_{2} C_{1} = C_{2}

F_{2} C_{1} = C_{2} = C_{3} = C_{4} F_{2}

y z

–plane then incorrect statement is:

Q. The formation of a double bond in an oxygen molecule is explained below. Arrange the given points in a sequential order.
(a) 2p

_{y}

orbitals of each oxygen atom overlap laterally/sidewise to form a pi bond.
(b) Thus, a double bond between two oxygen atoms in which one p

_{z}

_{z}

sigma bond and p

_{y}

_{y}

π

bond is formed.
(c) All the three 2p orbitals are perpendicular to each other. Hence 2p

_{z}

orbitals of each oxygen atom overlap end to end to form a sigma bond.
(d) The electronic configuration of oxygen is

O

^{2}

^{2}

_{x}^{1}

_{y}^{2}

_{z}^{1}

State True or False.

Linear overlap of atomic p-orbitals leads to a sigma bond.

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