객관식
In the context of and bonds, what type(s) of orbital overlap are present in a double bond between two carbon atoms in ethene ()?
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1. A Review of General Chemistry
Sigma and Pi Bonds
객관식
Which of the following correctly describes a single bond compared to a double bond in terms of and bonds?
A
A single bond contains one bond, while a double bond contains two bonds.
B
A single bond contains one bond and one bond, while a double bond contains two bonds.
C
A single bond contains two bonds, while a double bond contains one bond and two bonds.
D
A single bond contains only one bond, while a double bond contains one bond and one bond.
검증된 단계별 안내1
Recall the definitions of \( \sigma \) and \( \pi \) bonds: a \( \sigma \) bond is a single covalent bond formed by the head-on overlap of atomic orbitals, while a \( \pi \) bond is formed by the side-to-side overlap of p orbitals.
Understand that a single bond between two atoms consists of only one \( \sigma \) bond, which allows free rotation around the bond axis.
Recognize that a double bond consists of one \( \sigma \) bond and one \( \pi \) bond; the \( \pi \) bond restricts rotation and adds extra bonding strength.
Note that a double bond does not contain two \( \pi \) bonds or two \( \sigma \) bonds; rather, it is a combination of one \( \sigma \) and one \( \pi \) bond.
Therefore, the correct description is that a single bond contains one \( \sigma \) bond, while a double bond contains one \( \sigma \) bond and one \( \pi \) bond.
