Chemistry Help on Shapes of Molecules

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Panicky student
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#1
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#1
Is there a mistake in the book?
I will show a picture in the book
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Panicky student
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#2
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#2
I may be wrong though.
Perhaps, because I am confused.
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Panicky student
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#3
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#3
Q3 is the question I require help.
I am confused for Atom A, because I think it’s a trigonal pyramidal with a bond angle of 107 degrees. But the book says that the bond angle is 120 degrees,
So I am in confusion.
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blend100
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#4
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#4
(Original post by Panicky student)
Q3 is the question I require help.
I am confused for Atom A, because I think it’s a trigonal pyramidal with a bond angle of 107 degrees. But the book says that the bond angle is 120 degrees,
So I am in confusion.
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yes i think thats incorrect as trigonal planar is 120 not trigonal pyrimidal
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briananj
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#5
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#5
(Original post by Panicky student)
Q3 is the question I require help.
I am confused for Atom A, because I think it’s a trigonal pyramidal with a bond angle of 107 degrees. But the book says that the bond angle is 120 degrees,
So I am in confusion.
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I believe that the book is wrong in the nomecature because if it where a trigonal pyramidal it would have to have a lone pair of electrons (for example, ammonia) for it to repel so it has the "pyramid" shape, since all the electrons are bonded it is trigonal planar, sorry.
Last edited by briananj; 1 year ago
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Panicky student
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#6
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#6
(Original post by briananj)
I believe that the book is wrong in the nomecature because if it where a trigonal pyramidal it would have to have a lone pair of electrons (for example, ammonia) for it to repel so it has the "pyramid" shape, since all the electrons are bonded it is trigonal planar, sorry.
I thought that as well, because it should have a lone pair and three bonded pairs.
So that’s why I am confused
Last edited by Panicky student; 1 year ago
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charco
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#7
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#7
(Original post by Panicky student)
I thought that as well, because it should have a lone pair and three bonded pairs.
So that’s why I am confused
There are no lone pairs. It has two single bonds and one double bond, i.e. three regions of electron density (electron domains)
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Vespa21
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#8
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3 areas of electron density (2 single, 1 x double) repulsion is equal from the three regions, so 120 degrees and trigonal planar
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Panicky student
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#9
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#9
Thank you guys for your help.
I really appreciate it for clearing out my confusion.
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