Q50 · CSIR-NET Chemistry, June 2012

Paper: CSIR-NET June 2012 · Subject: Inorganic Chemistry · Chapter: Organometallic Compounds · Topic: Cluster Compounds Wade Rules · Marks: 2 · Difficulty: Easy

The cluster having arachno type structure is:

(a)$\left[\mathrm{Os}_{5}(\mathrm{CO})_{16}\right]$

(b)$\left[\mathrm{Os}_{3}(\mathrm{CO})_{12}\right]$

(c)$\left[\operatorname{Ir}_{4}(\mathrm{CO})_{12}\right]$

(d)$\left[\mathrm{Rh}_{6}(\mathrm{CO})_{16}\right]$

Answer

Answer: B ✓ checked by 4AB · confidence high

Explanation

Os₃(CO)₁₂: 48 cluster electrons → 6 skeletal pairs for 3 vertices (n + 3) — arachno (b).

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