6. Which of the following complex has the lowest energy of CO stretching frequency in the IR region (3 points)?
(A) $[\mathrm{V}(\mathrm{CO})_6]^+$
(B) $\mathrm{Cr}(\mathrm{CO})_6$
(C) $[\mathrm{Mn}(\mathrm{CO})_6]^+$
(D) $\mathrm{Fe}(\mathrm{CO})_5$
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統計: 尚無統計資料
統計: 尚無統計資料