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polarity of shapes

Posted: Tue Dec 03, 2019 10:39 pm
by Savannah Mance 4G
Are molecules that are trigonal planar usually non polar?

Re: polarity of shapes

Posted: Tue Dec 03, 2019 10:42 pm
by Rodrigo2J
The molecule will be non polar as long as it doesn't have a net dipole moment. So as long as the three atoms around the central atom are the same then yes it should be non polar for a trigonal planar geometry.

Re: polarity of shapes

Posted: Tue Dec 03, 2019 10:44 pm
by Nawal Dandachi 1G
only if they are symmetric and all the atoms attached to the central atom are the same; however, if the atoms attached to the central atom are not the same, then it is polar.

Re: polarity of shapes

Posted: Tue Dec 03, 2019 10:50 pm
by sarahsalama2E
Also, remember that typically shapes that have lone pairs are usually always polar even if all the attached atoms are the same; however AX4E2, square planar, is an exception to that rule because it becomes nonpolar because the dipole moments cancel. You can see this if you draw the 3-D shape.