MCQ
Which of the following diatomic molecular species has only $\pi$ bonds according to Molecular Orbital Theory?
- A$O_2$
- B$N_2$
- ✓$C_2$
- D$Be_2$
✓
Answer
Correct option: C.
$C_2$
c
According to $M.O.T.$ electronic configuration of $\mathrm{C}_{2}$ molecule is
According to $M.O.T.$ electronic configuration of $\mathrm{C}_{2}$ molecule is
$\sigma 1 \mathrm{s}^{2}<\sigma^{*} 1 \mathrm{s}^{2}<\sigma 2 \mathrm{s}^{2}<\sigma^{*} 2 \mathrm{s}^{2}<\pi_{2} \mathrm{p}_{\mathrm{x}}^{2}=\pi_{2} \mathrm{p}_{\mathrm{y}}^{2}$
so, $\mathrm{C}_{2}$ molecule contain only $\pi$ bond
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