Question 6.3 (Sixth Edition)

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Steve Magana 2I
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Question 6.3 (Sixth Edition)

Postby Steve Magana 2I » Sun Nov 18, 2018 10:31 pm

Question: For which of the following molecules will dipole–dipole interactions be important: (a) CH4; (b) CH3Cl; (c) CH2Cl2; (d) CHCl3; (e) CCl4?

Can someone explain how you would know if the interaction is important? Thank you!

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Re: Question 6.3 (Sixth Edition)

Postby armintaheri » Sun Nov 18, 2018 10:50 pm

The question is basically asking which compounds experience dipole-dipole interactions. You can eliminate A and E. A is nonpolar because carbon and hydrogen have almost identical electronegativities. E is nonpolar since the chlorines are symmetrically arranged around the carbon. So A and E will not participate in dipole-dipole interactions. B and C and D are all polar because the chlorines are not symmetrically arranged, so dipole-dipole interactions will be important for those three.

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