✔ 最佳答案
SbF5 will give a shape of trigonal pyramidal because there are 5 bond-electron pairs in the central atom Sb.
(SbF5)^2- will give a shape of octahedral because there are 6 bond-electron pairs in the central atom Sb. (extra 2 electrons are received)
The charge of (SbF5)^-2 cannot be -1 or -3, usually the electrons are 2 in a pair. If -1/-3 electrons are given to the central atom Sb. There will be 11 electrons/13 electrons in the central atom Sb, which do not exist.
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2010-12-14 12:27:14 補充：
(SbF5)^2- will give a shape of octahedral because there are 5 bond-electron pairs "in addition of 1 lone pair" in the central atom Sb. (extra 2 electrons are received)
2010-12-14 12:27:52 補充：
So it should give a shape of square pyramidal, not octahedral.
Sorry for the mistake made here.
2010-12-14 22:12:18 補充：
Yes, i have made the mistake in my comment.
It is changed into square pyramidal.
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