March 28, 2024, 09:12:34 PM
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Topic: Expanded Valence  (Read 6010 times)

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Offline ThePhenom

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Expanded Valence
« on: February 20, 2008, 06:25:08 PM »
Im not sure why sulfur is able to bond with six different atoms at once, and why phosphorus can also achieve an expanded valence.  ???

Offline wilson300

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Re: Expanded Valence
« Reply #1 on: February 21, 2008, 01:04:35 AM »
S and P have orbitals 3s, 3p and 3d. If 3s and 3p are filled up, an expanded valence can be achieved by filling up the 3d orbital.

Offline AWK

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Re: Expanded Valence
« Reply #2 on: February 21, 2008, 01:07:10 AM »
see at electronic structure of:
PCl5, HPF6
AWK

Offline ThePhenom

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Re: Expanded Valence
« Reply #3 on: February 21, 2008, 08:42:39 PM »
S and P have orbitals 3s, 3p and 3d. If 3s and 3p are filled up, an expanded valence can be achieved by filling up the 3d orbital.

Why does this happen though?

Offline agrobert

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Re: Expanded Valence
« Reply #4 on: February 21, 2008, 09:03:56 PM »
It is actually a topic that is not fully understood.  Depending on your class it may be acceptable to say that sulfur accesses higher valence shells but some would say that it is much more complicated than this.

http://pubs.acs.org/cgi-bin/abstract.cgi/jacsat/1986/108/i13/f-pdf/f_ja00273a006.pdf?sessid=6006l3
In the realm of scientific observation, luck is only granted to those who are prepared. -Louis Pasteur

Offline DonalB

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Re: Expanded Valence
« Reply #5 on: February 28, 2008, 06:39:45 AM »
Have you studied hybridized orbitals in your class?

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