Among the given boranes and heteroboranes, the example which belongs to 'closo' type is · ABC26IN0526
Subject: Inorganic Chemistry · Chapter: Organometallic Compounds · Topic: Cluster Compounds Wade Rules · Exam: GATE 2005-2021 · Marks: 2 · Difficulty: Easy
Among the given boranes and heteroboranes, the example which belongs to 'closo' type is
(a)$\mathrm{B}_{5} \mathrm{H}_{8}^{-}$
(b)$\left[\mathrm{C}_{2} \mathrm{B}_{9} \mathrm{H}_{11}\right]^{2-}$
(c)$\mathrm{GeC}_{2} \mathrm{B}_{9} \mathrm{H}_{11}$
(d)$\mathrm{B}_{6} \mathrm{H}_{10}$
Answer
Answer: C ✓ checked by 4AB · confidence high
The source book printed no answer; this one was worked out and checked — see the explanation.
Explanation
Skeletal electron pairs: B₅H₈⁻ 7 pairs for 5 vertices (n+2, nido); [C₂B₉H₁₁]²⁻ 13 pairs for 11 vertices (n+2, nido); B₆H₁₀ 8 pairs for 6 (nido); GeC₂B₉H₁₁ 13 pairs for 12 vertices (n+1): closo.
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