not planar?

[prsndwg]

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Which one is not planar?
a.NO3-
b.BF3
c.AlCl3
d.PBr3
d.SO3

what determines whether a structure is planar or not?

Thanks in advance.

 

[suhshi]

Which one is not planar?
a.NO3-
b.BF3
c.AlCl3
d.PBr3
d.SO3

what determines whether a structure is planar or not?

Thanks in advance.

is the answer d.

PBr3 has 4 electron bonding sites around P, the central atom. Thus
is it a trigonal pyramidal shape.
All the rest of planar.

Count the number of electron bonding sites around the central atom.

 

[Sublimation]

yup its D. Draw out the lewis strctures and the one that is sp2 hybridized is planar.

 

[prsndwg]

what about S03? isnt it SP3?

 

[suhshi]

what about S03? isnt it SP3?

sp2

24 total electrons
double bond with O

there are 3 bonding sites

 

[prsndwg]

got it..thanks