Polarity of Asymmetrical Molecules

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Chloe Thorpe 1J
Posts: 77
Joined: Fri Sep 28, 2018 12:16 am

Polarity of Asymmetrical Molecules

Postby Chloe Thorpe 1J » Wed Nov 28, 2018 12:00 am

Can bent molecules or trigonal pyramidal molecules (and the like) ever be nonpolar?

Nancy Hu - 4E
Posts: 30
Joined: Fri Sep 28, 2018 12:28 am

Re: Polarity of Asymmetrical Molecules

Postby Nancy Hu - 4E » Wed Nov 28, 2018 12:14 am

If the structure is asymmetrical, the dipole moments won't cancel out and so the molecule would be polar.

Nathan Tran 4K
Posts: 92
Joined: Fri Sep 28, 2018 12:16 am

Re: Polarity of Asymmetrical Molecules

Postby Nathan Tran 4K » Wed Nov 28, 2018 12:37 am

No, these shapes cannot be nonpolar because of the inherent asymmetry of the molecules. The lone pair in each shape pushes the other atoms so bond lengths are slightly different than that of their arrangement structure counterparts. Thus, the dipole vectors will not cancel out.

705137650
Posts: 16
Joined: Fri Sep 28, 2018 12:18 am

Re: Polarity of Asymmetrical Molecules

Postby 705137650 » Wed Nov 28, 2018 11:17 am

If the atoms in the molecule are symmetrical, the charges are balanced by each other. The molecules are considered to be nonpolar. However, if the molecule is asymmetrical, it is considered to be polar. So if it is lopsided, it is polar.

Dana Wilks 3I
Posts: 30
Joined: Fri Sep 28, 2018 12:23 am

Re: Polarity of Asymmetrical Molecules

Postby Dana Wilks 3I » Wed Nov 28, 2018 11:23 am

To be non polar, the molecule must be symmetric. This requires the shape to be linear, trigonal planar, and tetrahedral, which allows the net dipole moment to be zero if the atoms surrounding the central atom are the same.


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