The structure of iron pentacarbonyl, Fe(CO)5 is :
Correct answer: B. Trigonal bipyramidal
- A. Square planar
- B. Trigonal bipyramidal
- C. Triangular
- D. Octahedral
Explanation
According to VSEPR theory and experimental evidence, the geometry that minimizes repulsion for a centralatom bonded to five other groups (AX5) is trigonal bipyramidal. This is the observed structure for iron pentacarbonyl.
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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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