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Topic: Why this complex ion can't exist?  (Read 2702 times)

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Offline Johulus

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Why this complex ion can't exist?
« on: February 24, 2015, 05:15:41 PM »
There is a complex ion of aluminum AlF63- but why a complex ion AlCl63- is not possible to exist? I would be grateful if someone would lighten me up.
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Offline mjc123

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Re: Why this complex ion can't exist?
« Reply #1 on: February 25, 2015, 04:53:01 AM »
I'll try and enlighten you.
As a first approximation, consider the following ionic radii:
Al3+ 53 pm; F- 133 pm; Cl- 180 pm
What are the implications for making an MX6 complex?
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Offline Bublik

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Re: Why this complex ion can't exist?
« Reply #2 on: March 01, 2015, 01:58:47 PM »
Is it simply a matter of not enough space?
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Offline Borek

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Re: Why this complex ion can't exist?
« Reply #3 on: March 01, 2015, 05:02:08 PM »
Yep. It is called a steric effect.
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