UPSC Combined Geo-Scientist, Mains · 2019 · Mains Paper I
Q5(c). Distorted octahedral Cu²⁺ in CuF₂
Question
The crystal structure of CuF₂ revealed that the Cu²⁺ ion is six coordinated, wherein four Cu–F bond distances are 1.93 Å and the remaining two are 2.27 Å. Explain.
Model answer
The free solution for 2019 answers questions 1, 2, 4, 6, 9 and 11, the ones picked in its time plan. This part is not answered on the site yet. New answers are announced on Telegram.
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CoversJahn-Teller distortionCuF2tetragonal elongationd9
All parts of Question 5
- 5(a) High-spin and low-spin complexes; rarity of low-spin tetrahedral10 marks
- 5(b) CFSE in octahedral and tetrahedral fields10 marks
- 5(c) Distorted octahedral Cu²⁺ in CuF₂10 marks