Predict the parent structures of the following molecules.
(a)
BeCl
2
(b)
PH
3
(c)
SCl
2
(d)
SO
2
(e)
H
2
Te
(f)
SiH
4
(g)
BBr
3
(h)
H
2
O
(a)
Expert Solution
Interpretation Introduction
Interpretation:
The parent structure of BeCl2 is to be stated.
Explanation of Solution
The sum of atoms attached to the central metal atom and the unshared electron pairs is termed as electron domains. The electron domains are calculated by drawing the Lewis structure which results in the parent structure or geometry of the molecule.
There are two electron domains present in BeCl2 as there are two bonded chlorine atoms. Thus, the Lewis structure of BeCl2 is drawn below.
Thus, the parent structure of BeCl2 is linear as the electron domain is two.
(b)
Expert Solution
Interpretation Introduction
Interpretation:
The parent structure of PH3 is to be stated.
Explanation of Solution
The sum of atoms attached to the central metal atom and the unshared electron pairs is termed as electron domains. The electron domains are calculated by drawing the Lewis structure which results to the parent structure or geometry of the molecule.
There are four electron domains present in the PH3 as there are three bonded hydrogen atoms and one unshared electron pair. Thus, the lewis structure of PH3 is drawn below.
Thus, the parent structure of PH3 is tetrahedral as an electron domain is four.
(c)
Expert Solution
Interpretation Introduction
Interpretation:
The parent structure of SCl2 is to be stated.
Explanation of Solution
The sum of atoms attached to the central metal atom and the unshared electron pairs is termed as electron domains. The electron domains are calculated by drawing the Lewis structure which results in the parent structure or geometry of the molecule.
There are four electron domains present in SCl2 as there are two bonded chlorine atoms and two unshared electron pairs. Thus, the lewis structure of SCl2 is drawn below.
Thus, the parent structure of SCl2 is tetrahedral as the electron domain is four.
(d)
Expert Solution
Interpretation Introduction
Interpretation:
The parent structure of SO2 is to be stated.
Explanation of Solution
The sum of atoms attached to the central metal atom and the unshared electron pairs is termed as electron domains. The electron domains are calculated by drawing the Lewis structure which results in the parent structure or geometry of the molecule.
There are three electron domains present in the SO2 as there are two bonded oxygen atoms and one unshared electron pairs. Thus, the lewis structure of SO2 is drawn below.
Thus, the parent structure of SO2 is a trigonal planar as the electron domain is three.
(e)
Expert Solution
Interpretation Introduction
Interpretation:
The parent structure of H2Te is to be stated.
Explanation of Solution
The sum of atoms attached to the central metal atom and the unshared electron pairs is termed as electron domains. The electron domains are calculated by drawing the Lewis structure which results in the parent structure or geometry of the molecule.
There are four electron domains present in H2Te as there are two bonded hydrogen atoms and two unshared electron pairs. Thus, the lewis structure of H2Te is drawn below.
Thus, the parent structure of H2Te is tetrahedral as the electron domain is four.
(f)
Expert Solution
Interpretation Introduction
Interpretation:
The parent structure of SiH4 is to be stated.
Explanation of Solution
The sum of atoms attached to the central metal atom and the unshared electron pairs is termed as electron domains. The electron domains are calculated by drawing the Lewis structure which results in the parent structure or geometry of the molecule.
There are four electron domains present in SiH4 as there are only four bonded hydrogen atoms. Thus, the lewis structure of SiH4 is drawn below.
Thus, the parent structure of SiH4 is tetrahedral as the electron domain is four.
(g)
Expert Solution
Interpretation Introduction
Interpretation:
The parent structure of BBr3 is to be stated.
Explanation of Solution
The sum of atoms attached to the central metal atom and the unshared electron pairs is termed as electron domains. The electron domains are calculated by drawing the Lewis structure which results in the parent structure or geometry of the molecule.
There are three electron domains present in the BBr3 as there are only three bonded bromine atoms. Thus, the lewis structure of BBr3 is drawn below.
Thus, the parent structure of BBr3 is a trigonal planar as the electron domain is three.
(h)
Expert Solution
Interpretation Introduction
Interpretation:
The parent structure of H2O is to be stated.
Explanation of Solution
The sum of atoms attached to the central metal atom and the unshared electron pairs is termed as electron domains. The electron domains are calculated by drawing the Lewis structure which results in the parent structure or geometry of the molecule.
There are four electron domains present in the H2O as there are only two bonded hydrogen atoms and two unshared electron pairs. Thus, the lewis structure of H2O is drawn below.
Thus, the parent structure of H2O is tetrahedral as the electron domain is four.
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(f) SO:
Best Lewis Structure
3
e group geometry:_
shape/molecular geometry:,
(g) CF2CF2
Best Lewis Structure
polarity:
e group arrangement:_
shape/molecular geometry:
(h) (NH4)2SO4
Best Lewis Structure
polarity:
e group arrangement:
shape/molecular geometry:
polarity:
Sketch (with angles):
Sketch (with angles):
Sketch (with angles):
1.
Problem Set 3b
Chem 141
For each of the following compounds draw the BEST Lewis Structure then sketch the molecule (showing
bond angles). Identify (i) electron group geometry (ii) shape around EACH central atom (iii) whether the
molecule is polar or non-polar (iv)
(a) SeF4
Best Lewis Structure
e group arrangement:_
shape/molecular geometry:
polarity:
(b) AsOBr3
Best Lewis Structure
e group arrangement:_
shape/molecular geometry:
polarity:
Sketch (with angles):
Sketch (with angles):
(c) SOCI
Best Lewis Structure
2
e group arrangement:
shape/molecular geometry:_
(d) PCls
Best Lewis Structure
polarity:
e group geometry:_
shape/molecular geometry:_
(e) Ba(BrO2):
Best Lewis Structure
polarity:
e group arrangement:
shape/molecular geometry:
polarity:
Sketch (with angles):
Sketch (with angles):
Sketch (with angles):
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