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How is [Mn₂(CO)₁₀] built?

ATwo square pyramidal Mn(CO)₅ units with a Mn-Mn bond
BTwo tetrahedral Mn(CO)₄ units joined by CO
CTwo Mn atoms bridged by two CO groups
DTwo octahedral Mn(CO)₆ units sharing an edge
Answer & Solution
Correct answer: A. Two square pyramidal Mn(CO)₅ units with a Mn-Mn bond
Each manganese carries five CO groups in a square pyramid, and the two halves are held by a direct Mn-Mn bond.
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