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Ch.10 - Chemical Bonding II: Molecular Shapes & Valence Bond Theory
Tro - Chemistry: A Molecular Approach 4th Edition
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Tutti i libri di testoTro 4th EditionCh.10 - Chemical Bonding II: Molecular Shapes & Valence Bond TheoryProblema 88a
Capitolo 10, Problema 88a

The structure of acetylsalicylic acid (aspirin) is shown here. How many π bonds are present in acetylsalicylic acid?

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Identify the types of bonds present in the structure of acetylsalicylic acid.
Recall that π bonds are found in double and triple bonds.
Examine the structure of acetylsalicylic acid for any double or triple bonds.
Count the number of double bonds in the structure, as each double bond contains one π bond.
Sum the π bonds from each double bond to find the total number of π bonds in acetylsalicylic acid.

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π Bonds

π bonds are a type of covalent bond that occurs when two lobes of one involved atomic orbital overlap with two lobes of another, forming a bond that is generally weaker than a sigma bond. They are typically found in double and triple bonds, where one bond is a sigma bond and the others are π bonds. Understanding the structure of molecules, including the presence of π bonds, is crucial for analyzing their chemical properties.
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Bond Angles

Molecular Structure

The molecular structure of a compound refers to the arrangement of atoms within the molecule, including the types of bonds (single, double, triple) and the spatial orientation of these bonds. In the case of acetylsalicylic acid, recognizing how the atoms are connected and the presence of functional groups is essential for determining the number of π bonds. This structural understanding aids in predicting the reactivity and properties of the molecule.
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Molecular Formula

Functional Groups

Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. In acetylsalicylic acid, the presence of carboxylic acid and ester functional groups influences its chemical behavior and interactions. Identifying these groups helps in understanding the overall structure and the number of π bonds present in the molecule.
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Carbonyl Functional Groups
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