Question 4.29  [ENDORSED]

(Polar molecules, Non-polar molecules, etc.)

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Cassidy 1G
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Question 4.29

Postby Cassidy 1G » Sun Nov 12, 2017 11:20 pm

I am not sure how to answer this type of problem in the textbook. It says, "There are three isomers of dichlorobenzene, C6H4Cl2, which differ in the relative positions of the chlorine atoms on the benzene ring. (a) Which of the three forms are polar? (b) Which has the largest dipole moment?" There is a drawing in the textbook that shows the isomers. It basically shows that the angle between two Cl atoms in increasing.

Suchita 2I
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Re: Question 4.29

Postby Suchita 2I » Mon Nov 13, 2017 12:44 am

a) 1-2 dichlorobenzene and 1-3 dichlorobenzene are polar while 1-4 dichlorobenzene is non polar. This is because while 1-2 and 1-3 dichlorobenzene have a net dipole movement, there is no net dipole in 1-4 dichlorobenzene due to the symmetry of the molecule.

b)1-2 dichlorobenzene has the largest dipole moment as the delta negative charge is concentrated more on one side of the molecule than in 1-3 dichlorobenzene.

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Re: Question 4.29

Postby Akash_Kapoor_1L » Mon Nov 13, 2017 12:25 pm

What method do we use to name the isomers as 1-, 1-3, and 1-4?

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Re: Question 4.29  [ENDORSED]

Postby Chem_Mod » Mon Nov 13, 2017 2:37 pm

You can determine the naming based on the position of the chlorine atom.

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