N-Heterocyclic Carbene (NHC) Adducts of [(C₅H₅)₂Mn] Revisited: Nothing More, Nothing Less than High-Spin (S = 5/2) Molecules!

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• 作者：Marc D. Walter ; Dirk Baabe ; Matthias Freytag and Peter G. Jones
• 刊名：Zeitschrift f蹲 anorganische und allgemeine Chemie
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：642
• 期：22
• 页码：1259-1263
• 全文大小：423K
• ISSN：1521-3749

文摘

Addition of N-heterocyclic carbenes [L = 1,3-di-tert-butylimidazolin-2-ylidene (ItBu), 1,3-diisopropyl-4,5-dimethylimidazolin-2-yildene (IiPrMe₂), 1,3-di-mesitylimidazolin-2-yildene (IMes), and 1,3-bis(2,6-diisopropylphenyl)imidazolin-2-yildene (IPr)] to manganocene [(C₅H₅)₂Mn] forms the neutral Lewis base adducts [(C₅H₅)₂Mn(L)] (2–5) in moderate yields. Complexes 2–4 were structurally characterized and their solid-state magnetism was investigated between T = 2.6–300 K. In contrast to literature reports, these materials exclusively adopt a high-spin (S = 5/2) ground state.