The three dimensional structure of compound $\left[\mathrm{Co}\left(\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4}(\mathrm{OH})_{2}\right)_{3}\right] \mathrm{Br}_{6}$, has
(a)Twelve Co-O and twelve Co-N bonds
(b)Ten Co-O and ten Co-N bonds
(c)Fourteen $\mathrm{Co}-\mathrm{O}$ and ten $\mathrm{Co}-\mathrm{N}$ bonds
(d)Twelve $\mathrm{Co}-\mathrm{O}$ and ten $\mathrm{Co}-\mathrm{N}$ bonds
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
The central Co is bound by six bridging OH (6 Co–O); each outer Co has two OH and four NH₃ (3 × 2 = 6 more Co–O, 3 × 4 = 12 Co–N). Total 12 Co–O and 12 Co–N.