Reaction of [Ni(CN)₄]²⁻ with metallic potassium in liquid ammonia at -33° C yields complex E. The geometry… · ABC26IN0657
Subject: Inorganic Chemistry · Chapter: Coordination Chemistry · Topic: Coordination Compounds – General · Exam: JAM 2005-2022 · Marks: 2 · Difficulty: Medium
Reaction of $\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}$ with metallic potassium in liquid ammonia at $-33^{\circ} \mathrm{C}$ yields complex E . The geometry and magnetic behavior of E, respectively, are
(a)Octahedral and paramagnetic
(b)Tetrahedral and diamagnetic
(c)Square pyramidal and paramagnetic
(d)Square planar and diamagnetic
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
K reduces [Ni(CN)₄]²⁻ to K₄[Ni(CN)₄], Ni(0) d¹⁰ — tetrahedral and diamagnetic (b).