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(4 points) Which solvent below could involve ion-dipole interactions with Na? HaC CH3 d. CCl4 a. 13 H2 H2 e. H3C CH3 H2C CH2 H2C CH2 НС CH НС CH

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Answer #1

Answer:

Acetone will have ion-dipole interaction with the Na+ ion. As all the other solvents have zero dipole moment.

1. In CCl4, even in the presence of electronegative ion, the tetrahedral geometry cancels the dipole moment in the structure due to any form dipole.

2. n-pentane and hexane have zero dipole moment.

3. Benzene also have nearly zero dipole moment. But it interacts with the Na+ ion via cation-pi interactions. The availability of pi-cloud of electron density will interact with the positive charge on the cation.

4. The only solvent left is acetone, which have net dipole moment due to its geometry. The oxygen atom in the acetone basically coordinates with Na+ ion.

Ans: A

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