Which of the following transition complex will have most stable square planar structure?
Correct answer: C. [Cu(NH₃)₄]²⁺
- A. [MnCl₄]²⁻
- B. PCl₅
- C. [Cu(NH₃)₄]²⁺
- D. [Co(NH₃)₆]³⁺
Explanation
Square planar geometry is most commonly observed in complexes with a d⁸ electronic configuration.[Cu(NH₃)₄]²⁺ has a copper(II) ion (Cu²⁺) which has a d⁹ configuration, but it loses one electron to form a stable d⁸ configuration. This makes it the most likely to adopt a square planar structure.
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About Transition Elements
Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.
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