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Topic: sigma donor lead to high or low spin complex?  (Read 3595 times)

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Offline garnetwei

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sigma donor lead to high or low spin complex?
« on: October 28, 2012, 04:48:10 AM »
Since CN- is a sigma donor, so would (Co(CN)5)3- be high spin or low spin complex? how to explain? Can anyone help?

I just know that pi donor ligand will have high spin complexes...But, how about sigma donors?
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Offline Schrödinger

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Re: sigma donor lead to high or low spin complex?
« Reply #1 on: October 28, 2012, 07:32:53 AM »
CN- is a strong ligand. Thus, the splitting between the set of degenerate d-orbitals is large. So how exactly will you fill the electrons for this particular system?
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Offline garnetwei

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Re: sigma donor lead to high or low spin complex?
« Reply #2 on: October 28, 2012, 07:45:35 AM »
The lower energy orbital will be filled up with electron first before filling up with higher energy orbital. So we will get low spin complex. Am i right?
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Offline Schrödinger

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Re: sigma donor lead to high or low spin complex?
« Reply #3 on: October 28, 2012, 09:40:55 AM »
Yes. It will be a low spin complex.
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"Destiny is not a matter of chance; but a matter of choice. It is not a thing to be waited for; it is a thing to be achieved."
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Offline garnetwei

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Re: sigma donor lead to high or low spin complex?
« Reply #4 on: October 28, 2012, 10:28:57 AM »
Alrite...Thanks for your helps..XD...
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