Construct the molecular orbital diagram for He2 and then identify the bond order. Bond order: Click…
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Question “Construct the molecular orbital diagram for He2 and then identify the bond order. Bond order: Click…”
Answer
The number that indicates how many bonds are between two atoms is called bond order. The bond strength of a molecule is described by its bond order.
If the bond order for a molecule is higher, then the bond strength will also be higher.
{\rm{Bond Order}} \propto {\rm{Bond}}\,{\rm{strength}}Calculation of bond orders:
\begin{array}{l}\\{\rm{B}}{\rm{.O}}\,{\rm{ = }}\frac{{\,{\rm{1}}}}{{\rm{2}}}{\rm{(B}}{\rm{.E - A}}{\rm{.B}}{\rm{.E)}}\\\\{\rm{Where,}}\\\\{\rm{B}}{\rm{.O}}\,{\rm{ = }}\,{\rm{Bond}}\,{\rm{order}}{\rm{.}}\\\\{\rm{B}}{\rm{.E}}\,{\rm{ = }}\,{\rm{Bonding}}\,{\rm{electrons}}{\rm{.}}\\\\{\rm{A}}{\rm{.B}}{\rm{.E}}\,{\rm{ = }}\,{\rm{Anti - bonding}}\,{\rm{electrons}}{\rm{.}}\\\end{array}Below is the general molecular orbital chart.
The given molecule is $math_tag_2
Diagram of the molecular orbital for $math_tag_2
The given molecule is {\rm{H}}{{\rm{e}}_{\rm{2}}}
The number of bonding electrons found in {\rm{H}}{{\rm{e}}_{\rm{2}}}
The number of anti-bonding elements in $math_tag_2
Now,
\begin{array}{l}\\{\rm{B}}{\rm{.O}}\,{\rm{ = }}\,\,\frac{{\,{\rm{1}}}}{{\rm{2}}}{\rm{(B}}{\rm{.E - A}}{\rm{.B}}{\rm{.E)}}\,\\\\\,\,\,\,\,\,\,\,\,{\rm{ = }}\,\,\frac{{\,{\rm{1}}}}{{\rm{2}}}{\rm{(2 - 2)}}\\\\\,\,\,\,\,\,\,\,{\rm{ = }}\,\,\frac{{\,{\rm{1}}}}{{\rm{2}}}{\rm{(0)}}\\\\\,\,\,\,\,\,\,\,{\rm{ = }}\,\,{\rm{0}}\\\end{array}The bond order for $math_tag_2 is:
Below are the details of bond order and molecular orbital.
Conclusion
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