Chapter 12, Problem 17A

(a)

Interpretation Introduction

Interpretation:

The dipole moment arrow is to be drawn for the given C-F bond.

Concept introduction:

Dipole moment arrows are drawn from the atom with less electronegativity to atom with more electronegativity.

Answer to Problem 17A

  
  $\stackrel{\partial +}{\mathrm{C}}-\stackrel{\partial -}{\mathrm{F}}$

Explanation of Solution

Fluorine is more electronegative than carbon because left to right electronegativity increases. So, arrow will be from carbon to fluorine.

(b)

Interpretation Introduction

Interpretation:

The dipole moment arrow is to be drawn for the given Si-C bond.

Concept introduction:

Dipole moment arrows are drawn from the atom with less electronegativity to atom with more electronegativity.

Answer to Problem 17A

  
  $\stackrel{\partial +}{\mathrm{S}\mathrm{i}}-\stackrel{\partial -}{\mathrm{C}}$

Explanation of Solution

Carbon is more electronegative than silicon because down the group electronegativity decreases. So, arrow will be from carbon to silicon.

(c)

Interpretation Introduction

Interpretation:

The dipole moment arrow is to be drawn for the C-O bond.

Concept introduction:

Dipole moment arrows are drawn from the atom with less electronegativity to atom with more electronegativity.

Answer to Problem 17A

  
  $\stackrel{\partial +}{\mathrm{C}}-\stackrel{\partial -}{\mathrm{O}}$

Explanation of Solution

Oxygen is more electronegative than carbon because left to right electronegativity increases. So, arrow will be from carbon to oxygen.

(d)

Interpretation Introduction

Interpretation:

The dipole moment arrow is to be drawn for the given B-C bond.

Concept introduction:

Dipole moment arrows are drawn from the atom with less electronegativity to atom with more electronegativity.

Answer to Problem 17A

  
  $\stackrel{\partial +}{\mathrm{B}}-\stackrel{\partial -}{\mathrm{C}}$

Explanation of Solution

Carbon is more electronegative than boron because left to right electronegativity increases. So, arrow will be from carbon to boron.