Molecular and Electronic Structures of the Members of the Electron Transfer Series [Mn(bpy)3]n (n = 2+, 1+, 0, 1?) and [Mn(tpy)2]m (

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• 作者：Mei Wang ; Jason England ; Thomas Weyhermüller ; Karl Wieghardt
• 刊名：Inorganic Chemistry
• 出版年：2014
• 出版时间：February 17, 2014
• 年：2014
• 卷：53
• 期：4
• 页码：2276-2287
• 全文大小：551K
• ISSN：1520-510X

文摘

The members of the electron transfer series [Mn(bpy)₃]ⁿ (n = 2+, 1+, 0, 1鈭? and [Mn(tpy)₂]^m (m = 2+, 1+, 0) have been investigated using a combination of magnetochemistry, electrochemistry, and UV鈥搗is鈥揘IR spectroscopy; and X-ray crystal structures of [Mn^II(^Mebpy^{鈥?/sup>)₂(Mebpy0)]0, [Li(THF)₄][MnII(bpy鈥?/sup>)₃], and [MnII(tpy鈥?/sup>)₂]0 have been obtained (bpy = 2,2鈥?bipyridine; Mebpy = 4,4鈥?dimethyl-2,2鈥?bipyridine; tpy = 2,2鈥?6,2鈥?terpyridine; THF = tetrahydrofuran). It is the first time that the latter complex has been isolated and characterized. Through these studies, the electronic structures of each member of both series of complexes have been elucidated, and their molecular and electronic structures further corroborated by broken symmetry (BS) density functional theoretical (DFT) calculations. It is shown that all one-electron reductions that comprise the aforementioned redox series are ligand-based. Hence, all species contain a central high-spin MnII ion (S_Mn = 5/2). In contrast, the analogous series of TcII and ReII complexes possess low-spin electron configurations.}