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Magazine Chapter 1: Q-1-46P (page 2)
Which of the following molecules would you expect to have a dipole moment of zero? To answer parts g and h, you may need to review the Problem Solving Strategy on p. 39.
Short Answer
BeCl2, BF3, have zero dipole moment.
Step by step solution
Finding out the electronic configuration.
BeCl2
Electronic configuration: 1s22s22p0
BF3
Electronic configuration of Boron: 1s22s22p1
finding out the dipole moment.
BeCl2
BeCl2is sp hybridised thus has linear structure, bond angle is 180.
Cl-Be-Cl .As a result the dipole moments on both sides cancel each other and the net dipole moment is zero.
BF3
BF3 has sp2 hybridisation, thus is trigonal planar in shape.
The resultant dipole moment of any two bonds is equal and opposite to the dipole moment of the third bond. Thus cancels each other and gives a zero dipole moment.
The resultant dipole moment of any two bonds is equal and opposite to the dipole moment of the third bond. Thus cancels each other and gives a zero dipole moment.
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