Give difference : Bonding molecular orbital and antibonding molecular orbitals.
Bonding Molecular Orbitals ($BMO$) |
Antibonding Molecular Orbitals ($ABMO$) |
It is in short $BMO$. Its wave function is express by $\psi_{\text {MO }}$. |
It is in short $ABMO$ its wave function is express by $\psi_{\text {MO }}^{*}$ |
Definition: They are formed by the addition of atomic orbital is known of $BMO$. $\psi_{\mathrm{MO}}=\psi_{\mathrm{A}}+\psi_{\mathrm{B}}$ |
Definition : They are formed by the substractive effect of the atomic orbitals is known $ABMO.$ |
Qualitative, the formation of $BMO$ can be understood in terms of the constructive of the electron waves of the combining atoms and reinforce each other. |
$\psi^{*}$ MO $=\psi_{\text {A }}$ - $\psi_{\text {B }}$ Qualitative, the formation of $ABMO$ can be under- stood in terms of the destructive interference of the electron waves of the combining atoms and cancel each other. |
As a result, the electron density in a $BMO$ is located between the nuclei of the bonded atoms because of which the repulsing between the nuclei is very less. |
In case of an $ABMO$, most of the electron density is located away from the space between the nuclei
|
The nodal plane is not present in $BMO.$ |
There is a nodal plane (on which electron density is zero) between the nuclei. |
Electron placed in a $BMO$ tend to hold the nuclei together and stabilize a molecule. | The electron placed in the $ABMO$ destabilize the molecule. |
A $BMO$ always possesses lower energy than either the atomic orbitals that have combined to from it. | The $ABMO$ always possesses higher of energy than either of the atomic orbitals that have combined to form it |
In $BMO$, the repulsion between electron-electron is less than the attraction between electron and nuclei, So energy is less of $BMO$. | In$ABMO$, repulsion of electron is more than the attraction between the electrons and the nuclei, which causes a not increase energy. |
BMO is stable. e.g. $\sigma$ and $\pi$ are $BMO$. | $\mathrm{ABMO}$ is unstable. e.g. $\sigma^{*}$ and $\pi^{*}$ are $ABMO$. |
Which of the following is paramagnetic as well as it has fractional bond order ?
Match List$-I$ with List$-II.$
List$-I$ | List$-II$ |
$(a)$ $Ne _{2}$ | $(i)$ $1$ |
$(b)$ $N _{2}$ | $(ii)$ $2$ |
$(c)$ $F _{2}$ | $(iii)$ $0$ |
$(d)$ $O _{2}$ | $(iv)$ $3$ |
Choose the correct answer from the options given below:
Which of the following species would be expected paramagnetic
Which of the following contains $(2C -1e^-)$ bond
If Hund's Rule does not hold good, then which of the following pairs is diamagnetic