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Q18.

Expert-verified
Organic Chemistry
Found in: Page 29

Short Answer

Question: Predict the indicated bond angles in each compound drawn as a Lewis structure with no implied geometry.

a.

b.

c.

Answer

See the step by step solution

Step by Step Solution

Step-by-Step Solution Step 1: Bond angles

In covalent molecules or molecular ions, the bond angles between the bonds around a central atom depend on its geometry, which depends on the total number of -bond pairs and lone pairs.

Step 2: Geometry and bond angle

  • If the count of valence shell electron pairs is 2, the geometry will be linear with a bond angle of .
  • If the count of valence shell electron pairs is 3, the geometry will be trigonal planar with a bond angle of .
  • If the count of valence shell electron pairs is 4, the geometry will be tetrahedral with a bond angle of .

Step 3: Determination of indicated bond angles 

a. The count of valence shell electron pair is 2 for each carbon atom and has a linear geometry. So, the bond angle formed will have a value of.

Representation of bond angles of a

b. The count of valence shell electron pair is 3 for the central carbon and has a trigonal planar geometry. So, the bond angle formed will have a value of nearly .

Representation of bond angles of b

c. The count of valence shell electron pair is 4 for the central carbon atom and has a tetrahedral geometry. So, the bond angle formed will have a value of .

Representation of bond angles of c

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