Textbook Question
Ammonium chloride, NH4Cl, is a very soluble salt in water. (b) Is there an N—Cl bond in solid ammonium chloride?
11. Bonding & Molecular Structure
Lewis Dot Structures: Sigma & Pi Bonds
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How many pi bonds does the following molecule contain?
A
1
B
2
C
3
D
4
Verified step by step guidance1
Identify the structure of the molecule in the image. It is a benzene ring with a carboxylic acid group attached.
Recall that a pi bond is formed from the sideways overlap of p orbitals, typically found in double and triple bonds.
Examine the benzene ring. Benzene has alternating single and double bonds, known as conjugated pi bonds. Each double bond in benzene contains one pi bond.
Count the number of double bonds in the benzene ring. There are three double bonds, each contributing one pi bond.
Look at the carboxylic acid group attached to the benzene ring. The C=O bond in the carboxylic acid also contains one pi bond. Add this to the three pi bonds from the benzene ring to get a total of four pi bonds.
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