Interpretation: The arrangement of electron pairs in
Concept Introduction: An electron dot structure represents the arrangement of total valence electrons in a molecule. Here, electrons are represented as dots in pairs to show the lone pairs as well as the bond pairs.
Explanation of Solution
In
Since bromine is bonded with phosphorus via a single bond, the structure can be represented as follows:
There are 3 bonding pairs of electrons and 1 non-bonding pair; thus, the total number of electron pairs will be 4.
According to VSEPR theory, the following table shows the relation between the total number of bonding and non-bonding pair of electrons and the geometry of a molecule.
Total number of bonding and non-bonding pairs | Geometry |
6 | Octahedral |
5 | Trigonal pyramidal |
4 | Tetrahedral |
3 | Trigonal planar |
2 | Linear |
Thus, the arrangement of the electron pair will be tetrahedral as per the VSEPR theory.
Due to lone pair-bond pair repulsion, the shape will be pyramidal which is similar to
Therefore, the arrangement of the electron pair in
Chapter 8 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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