Asked in FBISE Chemistry 2023 — Paper 1 2023Moderate

The oxidation state of central metal (Mn) in the following complex Na[Mn(Co)5 (F)2]] is:

Correct answer: A. +2

  • A. +2
  • B. +3
  • C. -1
  • D. +1

Explanation

Certainly! The oxidation state of the central metal (Mn) in the complex Na[Mn(CO)5(F)2] is +2. This is because the complex is neutral, and the charges contributed by the ligands (CO and F) sum up to -2. Therefore, the oxidation state of Mn is determined to be +2 to balance the overall charge of the complex.

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About Electronic Structure of d-Block Elements

The electronic structure of d-block elements covers the filling of the (n-1)d and ns orbitals, general electronic configurations, and the exceptions shown by chromium and copper. It explains how partially filled d orbitals produce variable oxidation states, coloured ions, magnetic behaviour and complex formation, while distinguishing transition elements from elements with completely filled d subshells.

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