Question

PCl₅ exists but NCl₅ does not due to
(a) Inertness of N₂
(b) NCl₅ is unstable
(c) Larger size of N
(d) Non-availability of vacant d-atomic orbitals.

Answer 1

b)NCI5 is unstable.

Answer 2

Because of the non-availability of d-orbitals, boron is unable to expand its octet.

Therefore, the maximum covalence of boron.

PCi5 exists but NCi5 does not because.

N2 is inert; NCl5 is unstable; small size of N; of non-availability of vacant d-atomic orbitals. It has no electron in nearest d orbital 3d.