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Tetrahedral and its polarity

Posted: Thu Nov 21, 2019 10:15 pm
by Angeline 3E
im confused because a tetrahedral has bonds in different planes (like theres one w the dotted line and the solid line) does this means any molecule with a tetrahedral structure is always polar because how will the dipoles cancel out?

https://www.google.com/url?sa=i&source= ... 9684485742

Re: Tetrahedral and its polarity

Posted: Thu Nov 21, 2019 10:18 pm
by Victor James 4I
if all the bonded atoms are the same ( ex. CCl4, CH4) then there is no dipole

Re: Tetrahedral and its polarity

Posted: Thu Nov 21, 2019 10:28 pm
by Angeline 3E
Victor James 4I wrote:if all the bonded atoms are the same ( ex. CCl4, CH4) then there is no dipole

does this also apply to trigonal bipyramidal and octahedral?

Re: Tetrahedral and its polarity

Posted: Thu Nov 21, 2019 11:23 pm
by Victor James 4I
Angeline 3E wrote:
Victor James 4I wrote:if all the bonded atoms are the same ( ex. CCl4, CH4) then there is no dipole

does this also apply to trigonal bipyramidal and octahedral?


yep, for those the same thing applies. If they're all the same element around the central atom then its non-polar

Re: Tetrahedral and its polarity

Posted: Fri Nov 22, 2019 8:52 am
by Kassidy Ford 1I
If you have a molecule like CHF3, it will be polar because not all of the atoms surrounding the C are the same, but will that affect the bond angles or do you still assume that it is 109.5

Re: Tetrahedral and its polarity

Posted: Fri Nov 22, 2019 11:44 am
by nicole-2B
Kassidy Ford 1J wrote:If you have a molecule like CHF3, it will be polar because not all of the atoms surrounding the C are the same, but will that affect the bond angles or do you still assume that it is 109.5

I believe it will have bond angles of 109.5 since the shape is still tetrahedral.

Re: Tetrahedral and its polarity

Posted: Fri Nov 22, 2019 12:08 pm
by Justin Quan 4I
To add on, if the atoms surrounding the central atom is not the same, it will have dipole moment because the different surrounding atoms will have various electronegativity, therefore the dipole forces will not completely cancel out.