Using Wade's rules predict the structure type of [C₂B₅H₇] · ABC26IN0256
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: B ✓ checked by 4AB · confidence high
Explanation
Wade's rules: C₂B₅H₇ has 7 vertices. Skeletal electrons = 2 CH (3 each) + 5 BH (2 each) = 16 = 8 pairs = n + 1, so it is a closo cluster (a pentagonal bipyramid).
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