Multiple Choice
Which of the following statements is true of a polar covalent bond?
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11. Bonding & Molecular Structure
Chemical Bonds
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Which types of orbital overlap occur between two adjacent atoms to form a triple bond?
A
One sigma (σ) bond and two pi (π) bonds
B
One pi (π) bond and two sigma (σ) bonds
C
Three sigma (σ) bonds
D
Two sigma (σ) bonds and one pi (π) bond
Verified step by step guidance1
Recall that a triple bond between two atoms consists of one sigma (\sigma) bond and two pi (\pi) bonds.
Understand that a sigma (\sigma) bond is formed by the head-on (axial) overlap of orbitals, such as \( s \) or \( p_z \) orbitals along the internuclear axis.
Recognize that pi (\pi) bonds are formed by the side-by-side (lateral) overlap of two parallel \( p \) orbitals perpendicular to the internuclear axis.
In a triple bond, the first bond formed is always a sigma (\sigma) bond, which provides the strongest overlap and bond framework.
The remaining two bonds in the triple bond are pi (\pi) bonds, formed by the lateral overlap of two sets of parallel \( p \) orbitals, completing the triple bond structure.
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