How do you draw the structure of Al3O6?

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cyril1448
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Hi guys, just preparing my interview at Cambridge and suddenly this question comes into my eye. Any ideas?

Any help truly appreciated.
Cheers
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charco
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(Original post by cyril1448)
Hi guys, just preparing my interview at Cambridge and suddenly this question comes into my eye. Any ideas?

Any help truly appreciated.
Cheers
I don't believe that this compound exists!
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sabi599
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There's Al2O3. Haven't heard of what you said.

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JennieRDS
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I saw this question too while preparing for my Oxford interview on Monday. I don't think they would expect you to actually come up with an answer.
I looked at the valencies and then covered an A4 page with scribbled possible structures but couldn't find anything that worked. Eventually I decided to look at the spectroscopic notation and the possibility of half-filled orbitals. Then I thought about dative bonding and drew some lovely Lewis dot diagrams but to no avail. I also considered shapes of polyatomic ions (although I wouldn't know how to do this since it is not a single atom of Al or O). I think if you do that much they should be satisfied. Anything else you thought of?
They really just want you to demonstrate how you might go about answering the question and most of the time I don't think they care about the actual answer.
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charco
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(Original post by JennieRDS)
I saw this question too while preparing for my Oxford interview on Monday. I don't think they would expect you to actually come up with an answer.
I looked at the valencies and then covered an A4 page with scribbled possible structures but couldn't find anything that worked. Eventually I decided to look at the spectroscopic notation and the possibility of half-filled orbitals. Then I thought about dative bonding and drew some lovely Lewis dot diagrams but to no avail. I also considered shapes of polyatomic ions (although I wouldn't know how to do this since it is not a single atom of Al or O). I think if you do that much they should be satisfied. Anything else you thought of?
They really just want you to demonstrate how you might go about answering the question and most of the time I don't think they care about the actual answer.
You could just about argue a mixed ionic structure containing a ratio of three aluminium ions to four oxide ions and one peroxide ion. ...

EDIT

With a little research the molecule does exist and has a hexagonal arrangement of alternating aluminium and oxygen atoms (like benzene) with three more oxygen atoms attached to the aluminium atoms on the outside of the hexagon. It's one of a whole series of aluminium-oxygen cluster compounds.

Ref: http://www.researchgate.net/publicat...Al3O8_Clusters
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