The molecule/ion having paramagnetic nature and a bond order of 1.0 is

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Aicharya · Accepted Answer

$\mathrm{He}_2^{+}=\sigma s^2 < \sigma^* \mathrm{l} s^1$ $\mathrm{BO}=\frac{2-1}{2}=0.5$ $\mathrm{He}_2^{+}$ion having one unpaired electron. So, it is paramagnetic. $\begin{aligned} & \mathrm{Li}_2^{+}=\sigma s^2 < \sigma^{\star} 1 s^2 < \sigma 2 s^1 \ & \mathrm{BO}=\frac{3-2}{2}=0.5 \quad \text{(Paramagnetic)}\ & \mathrm{~B}_2=\sigma s^2 < \sigma^* 1 s^2 < \sigma 2 s^2 < \sigma^* 2 s^2 < \pi 2 p_x^1=\pi 2 p_y^1 \ & \mathrm{BO}=\frac{6-4}{2}=1 \quad \text{(Paramagnetic)} \ & \mathrm{C}_2 ightarrow \sigma 1 s^2 < { }^* \sigma 1 s^2 < \sigma 2 s^2 < { }^* \sigma 2 s^2 < \pi 2 p_x^2=\pi 2 p_y^2 \ & \mathrm{BO}=\frac{8-4}{2}=2 \quad \text{(Diamagnetic)} \ \end{aligned}$ .

The molecule/ion having paramagnetic nature and a bond order of 1.0 is

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