A=Bonding electrons B= Sigma-bonds C =Nonbonding electron pairs D= Hybrid orbitals having nonbonding electron pairs E =Hybrid orbitals used F= 3-D structure (NAME) G =Polar (P) or nonpolar (NP) MOLECULE OR ION LEWIS STRUCTURE A B C D E F G
Given the following molecules and/or ions, characterize them according to the format
shown in the table below. The central atom of the molecule/ion is shown in boldface.
The central atom or molecules marked with an asterisk (*) do not obey the octet rule.
PCl5*
OF2
SF4*
A=Bonding electrons
B= Sigma-bonds
C =Nonbonding electron pairs
D= Hybrid orbitals having
nonbonding electron pairs
E =Hybrid orbitals used
F= 3-D structure (NAME)
G =Polar (P) or nonpolar (NP)
| MOLECULE OR ION | LEWIS STRUCTURE | A | B | C | D | E | F | G |
PCl5 : It is a molecule.
Lewis structure is shown in image.
A = 10 (as there are 5 bonds and each bonds involves 2 electrons for formation)
B = 5 sigma bonds
C = There is no non-bonding electron pairs on central P atom
D = NA
E = Hybridization = No. of sigma bonds + l.p. = 5+0 = 5 = sp^3d
F = It has steric factor 5. No l.p. is present. So, both geometry and shape are trigonal bipyramidal (TBP).
G = it is non-polar.
OF2 :
It is a molecule.
Lewis structure is shown in image.
A = 4 (as there are 2 bonds and each bonds involves 2 electrons for formation)
B = 2 sigma bonds
C = There is two non-bonding electron pairs on central O atom
D = non-bonding electrons are present in sp^3 hybrid orbital.
E = Hybridization = No. of sigma bonds + l.p. = 2+2 = 4 = sp^3
F = It has steric factor 4. Two l.p. is present. So, its geometry is tetrahedral. and shape is bent (V-shaped).
G = it is polar.
SF4 :
It is a molecule.
Lewis structure is shown in image.
A = 8 (as there are 4 bonds and each bonds involves 2 electrons for formation)
B = 4 sigma bonds
C = There is 1 non-bonding electron pair on central S atom
D = l.p. is present in sp^3d hybrid orbital.
E = Hybridization = No. of sigma bonds + l.p. = 4+1 = 5 = sp^3d
F = It has steric factor 5. One l.p. is present. So, its geometry is Trigonal BiPyramidal TBP and shape is distorted Td or, see-saw.
G = it is polar.
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