## [Fe(CN)6]4-

KDang_1D
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### [Fe(CN)6]4-

In lecture, Dr. Lavelle used the example [Fe(CN)6]4-:

a. How is CN a ligand? Unless it's CN-, it would have an unpaired electron and wouldn't be able to form a coordinate covalent bond?
b. Why is the charge 4-?

Posts: 102
Joined: Wed Sep 18, 2019 12:18 am

### Re: [Fe(CN)6]4-

I believe it is CN-, meaning it can form the coordinate covalent bond. However, I'm not exactly sure why the total charge is 4-.

Claire Lo 3C
Posts: 55
Joined: Sat Aug 17, 2019 12:18 am

### Re: [Fe(CN)6]4-

The total charge is given so that you can calculate the charge of the Fe ion. In this case, since the total charge of 4-, and CN has a charge of -1, the charge of the Fe ion is +2

WYacob_2C
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### Re: [Fe(CN)6]4-

The CN- ions are considered the ligands, and these ions provide the electron pairs that form bonds to Fe2+

Joowon Seo 3A
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### Re: [Fe(CN)6]4-

CN binds to the Fe ion. The Fe ion is the central TM. By definition CN is a ligand. The charge is -4 because the Fe ion is +2. Since there are 6 CN- it becomes:
+2-6=-4

MBouwman_4A
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Joined: Wed Sep 18, 2019 12:21 am

### Re: [Fe(CN)6]4-

Since CN has a -1 charge, the -4 overall charge is given to calculate the charge of iron (Fe), which is +2.