coordination number

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Katherine Wu 1H
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Joined: Fri Aug 30, 2019 12:15 am
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coordination number

Postby Katherine Wu 1H » Mon Nov 25, 2019 10:09 pm

Determine the coordination number of the metal ion in each of the following complexes:
a.[PtCl2(en)2]^2+ and b.[Cr(edta)]^+
The answer for a. is 6 (en is bidentate) and b. is 6 (EDTA is hexadentate). I don't understand how it results in six?

kristi le 2F
Posts: 102
Joined: Thu Jul 11, 2019 12:15 am

Re: coordination number

Postby kristi le 2F » Mon Nov 25, 2019 10:29 pm

en is bidentate, meaning it has two binding sites, so each en will contribute a coordination number of 2. edta is hexadentate, so it has 6 binding sites.

Benjamin Feng 1B
Posts: 102
Joined: Sat Sep 07, 2019 12:19 am

Re: coordination number

Postby Benjamin Feng 1B » Mon Nov 25, 2019 10:51 pm

en contributes 2 binding sites, so 2 of them create 4 bonds. That makes 6 total bonds if you include the 2 bonds from Calcium meaning it has a coordination number of 6.

Caroline Zepecki
Posts: 101
Joined: Fri Aug 09, 2019 12:16 am

Re: coordination number

Postby Caroline Zepecki » Tue Nov 26, 2019 9:25 am

if you have a coordination site and a bond inside on of those compounds, does that mean that the coordination number would be four then?

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