JEE Main · 2024 · 30 Jan 2024 · Shift 2 · Coordination Compounds

The coordination geometry around the manganese in decacarbonyldimanganese(0)

(A)Octahedral✓ Correct
(B)Trigonal bipyramidal
(C)Square pyramidal
(D)Square planar

Answer: (A)

Solution

Decacarbonyldimanganese(0),

Mn_{2} (CO)_{10}

, has each manganese atom bonded to five terminal CO ligands and to the other manganese atom by a direct Mn–Mn bond. Counting the Mn–Mn bond as one coordination position along with the five CO ligands gives six groups around each metal, arranged at mutual 90°/180° angles. Each manganese centre is therefore octahedral.

Structure Structure showing octahedral geometry around Mn — Structure showing octahedral geometry around Mn

JEE Main · 2024 · 30 Jan 2024 · Shift 2 · Single correct option

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