Resonance Structure, Sigma and Pi Bonds

Front

What is a resonance structure?

Back

A resonance structure is one of two or more valid Lewis structures for a molecule that cannot be represented accurately by a single Lewis structure. It shows the delocalization of electrons within the molecule.

Front

What is a sigma bond?

Back

A sigma bond is a type of covalent bond formed by the direct overlap of atomic orbitals, resulting in a bond that is symmetrical around the bond axis.

Front

What is a pi bond?

Back

A pi bond is a type of covalent bond formed by the sideways overlap of p orbitals, which occurs in addition to a sigma bond between two atoms.

Front

How many sigma bonds are in a double bond?

Back

A double bond consists of one sigma bond and one pi bond.

Front

How many pi bonds are in a triple bond?

Back

A triple bond consists of one sigma bond and two pi bonds.

Front

What is the bond strength of a single bond?

Back

A single bond typically has a bond strength of about 1 bond order.

Front

What is the bond strength of a double bond?

Back

A double bond typically has a bond strength of about 2 bond order.

Front

What is the bond strength of a triple bond?

Back

A triple bond typically has a bond strength of about 3 bond order.

Front

How do you determine the number of resonance structures for a molecule?

Back

The number of resonance structures can be determined by identifying all possible arrangements of electrons that maintain the same connectivity of atoms.

Front

What is the significance of resonance structures in chemistry?

Back

Resonance structures help to illustrate the delocalization of electrons in a molecule, which can affect its stability and reactivity.