Radicals in Molecular Structure Notation

(Polar molecules, Non-polar molecules, etc.)

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Douglas Nguyen 2J
Posts: 71
Joined: Fri Sep 28, 2018 12:15 am

Radicals in Molecular Structure Notation

Postby Douglas Nguyen 2J » Sat Nov 17, 2018 5:24 pm

For the "ABE" notation (A being the central atom, B being atoms bonded to the central atom, and E being lone electron pairs around the central atom), how is it written for radicals?

ex: "4.19 Predict the shapes and estimate the bond angles of...(c) BH(2)-"

BH(2)- has only 5 electrons, so boron carries a single electron. How would the ABE notation be written in this instance?

Lynsea_Southwick_2K
Posts: 55
Joined: Fri Sep 28, 2018 12:25 am

Re: Radicals in Molecular Structure Notation

Postby Lynsea_Southwick_2K » Sat Nov 17, 2018 6:18 pm

I think BH2- has 6 electrons. B has 3, H2 has 2, and since it has the - charge it adds another electron, adding up to 6.
So the VSEPR formula would be AX2E1.

Douglas Nguyen 2J
Posts: 71
Joined: Fri Sep 28, 2018 12:15 am

Re: Radicals in Molecular Structure Notation

Postby Douglas Nguyen 2J » Sat Nov 17, 2018 7:28 pm

LOL I cannot do math. I'm leaving this school.


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