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.