According to Wade's rule, anion C₂ B₉ H₁₂ adopts

Q73 · CSIR-NET Chemistry, December 2014

Paper: CSIR-NET December 2014 · Subject: Inorganic Chemistry · Chapter: Organometallic Compounds · Topic: 18 Electron Rule · Marks: 2 · Difficulty: Easy

According to Wade's rule, anion $\mathrm{C}_{2} \mathrm{B}_{9} \mathrm{H}_{12}$ adopts

(a)closo-structure

(b)nido-structure

(c)arachno-sturcture

(d)hypho-structure

Answer

Answer: B ✓ checked by 4AB · confidence high

Explanation

[C₂B₉H₁₂]⁻: 11 vertices; skeletal electrons 2×3 + 9×2 + 1 (extra H) + 1 (charge) = 26 = 2n + 4 → nido (the dicarbollide precursor).

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