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.
![is
molecule
Atom
Atom
Не
Не
Не2
Energy](https://drive.google.com/uc?id=1vVPy-6Lh_XwxSeQwKWH1tcr2zimZSElq&export=download/Construct-the-molecular-orbital-diagram-for-He2-and-then-identify-the-bond-order.-Bond-order:-Click.png?x-oss-process=image/resize,w_560/format,webp)
The given molecule is $math_tag_2
Diagram of the molecular orbital for $math_tag_2
![1s
|4k
He atom
He atom
He2 Molecule
Atom
Atom
Energy](https://drive.google.com/uc?id=1V4-FG8A7IQWJ0mAFWY8waUmex4hkTNcW&export=download/Construct-the-molecular-orbital-diagram-for-He2-and-then-identify-the-bond-order.-Bond-order:-Click.png?x-oss-process=image/resize,w_560/format,webp)
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.
![bond order
ls
0
0.5
is
4h
1
S
He atom
He atom
O 1.5
4h
He2 Molecule
Atom
Atom
Energy](https://drive.google.com/uc?id=1nSWCHxD58iIFqec7o1r759f8uQws6nGE&export=download/Construct-the-molecular-orbital-diagram-for-He2-and-then-identify-the-bond-order.-Bond-order:-Click.png?x-oss-process=image/resize,w_560/format,webp)
Conclusion
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