According to Wade's rules, the cluster type and geometry of [Sn₉]⁴⁻, respectively, are · ABC26IN1465
Subject: Inorganic Chemistry · Chapter: Organometallic Compounds · Topic: Cluster Compounds Wade Rules · Exam: CSIR NET DEC 2017 · Marks: 2 · Difficulty: Easy
According to Wade's rules, the cluster type and geometry of $\left[\mathrm{Sn}_{9}\right]^{4-}$, respectively, are
(a)closo and tricapped trigonal prismatic
(b)nido and monocapped square-antiprismatic
(c)arachno and heptagonal bipyramidal
(d)closo and monocapped square antiprismatic
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
[Sn₉]⁴⁻: 9×2 + 4 = 22 = 2n + 4 skeletal electrons → nido, a monocapped square antiprism (C₄v).
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