The coordination number and geometry of cerium in [Ce (NO₃)₆]²⁻ are respectively,

Q48 · CSIR-NET Chemistry, December 2011

Paper: CSIR-NET December 2011 · Subject: Inorganic Chemistry · Chapter: Coordination Chemistry · Topic: Coordination Chemistry – General · Marks: 2 · Difficulty: Easy

The coordination number and geometry of cerium in $\left[\mathrm{Ce}\left(\mathrm{NO}_{3}\right)_{6}\right]^{2-}$ are respectively,

(a)6 and octahedron

(b)6 and trigonal prism

(c)8 and cubic

(d)12 and icosahedron

Answer

Answer: D ✓ checked by 4AB · confidence high

The source book printed no answer; this one was worked out and checked — see the explanation.

Explanation

Each nitrate binds bidentately, so six NO₃⁻ give 12 oxygen donors around Ce(IV) in an icosahedral arrangement.

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