Consider the complex $\left[\mathrm{CoH}\left({\mathrm{N}}_2\right){\left({\mathrm{PPh}}_3\right)}_3\right]$ having trigonal bipyramidal geometry in which cobalt is $ds{p}^3$ hybridised. Select the correct statements regarding the given complex.

In the given complex,

$\begin{array}{l}{\mathrm{Co}}^{+}=\left[\mathrm{Ar}\right]4s^{1}3d^7\end{array}$

$\begin{array}{l}{\mathrm{PPh}}_3\end{array}$ and ${\mathrm{N}}_2\to \text{ S.F.L. }$

${\mathrm{Co}}^{+}=\left[\mathrm{Ar}\right]3d^8$

Trigonal bipyramidal geometry with $ds{p}^3$ hybridisation. All electrons are paired so diamagnetic $ds{p}^3$. In TBP geometry, Bulky groups occupy equatorial position.

(a) Dinitrogenhydridotris (triphenylphosphine) cobalt (I) is the correct IUPAC name.

Hence correct option is (b, c, d).