ABC26IN0256 · Organometallic Compounds

Subject: Inorganic Chemistry · Chapter: Organometallic Compounds · Topic: Cluster Compounds Wade Rules · Exam: CSIR-NET 2015 · Marks: 2 · Difficulty: Easy

Using Wade's rules predict the structure type of $\mathrm{[C_2B_5H_7]}$
(a)nido
(b)closos
(c)arachno
(d)hypho
Answer
Answer (as printed): B
Explanation
$\mathrm{C_2B_5H_7}$ $\mathrm{C}\equiv \mathrm{BH}$ $(\mathrm{BH})_2$ $\mathrm{B_5H_7}$ $\equiv \mathrm{B_7H_9}$ $\equiv (\mathrm{B_7H_7})^{2-}$, (closo) $(\mathrm{B_nH_n})^{2-}$

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