过渡金属酰亚胺介导的 C-N 键形成是将氮引入有机化合物的有效策略。我们发现N -mesityl(β-diketiminato)iron imide 络合物t Bu LFeNMes ( t Bu L = 3,5-bis(2,6-diisopropylphenylimino)-2,2,6,6-tetramethylheptyl 和 Mes = 2,4,6-三甲基苯基)与末端炔烃底物通过新型炔烃碳胺化过程产生 β-炔基烯胺产物。化学计量的实验揭示催化剂失活途径涉及产生乙炔化复杂的,吨卜LFeCCPh,和三甲苯基胺(MesNH 2)从乙炔复杂,吨卜LFe(HCCPh) 和甲基叠氮化物 (MesN 3 )。这种反应性在配位添加剂 4-叔丁基吡啶 ( t BuPy)的存在下受到抑制,可能是通过形成四配位配合物t Bu LFe(HCCPh)( t BuPy)。这些见解有助于确定允许铁催化剂周转的反应条件。
过渡金属酰亚胺介导的 C-N 键形成是将氮引入有机化合物的有效策略。我们发现N -mesityl(β-diketiminato)iron imide 络合物t Bu LFeNMes ( t Bu L = 3,5-bis(2,6-diisopropylphenylimino)-2,2,6,6-tetramethylheptyl 和 Mes = 2,4,6-三甲基苯基)与末端炔烃底物通过新型炔烃碳胺化过程产生 β-炔基烯胺产物。化学计量的实验揭示催化剂失活途径涉及产生乙炔化复杂的,吨卜LFeCCPh,和三甲苯基胺(MesNH 2)从乙炔复杂,吨卜LFe(HCCPh) 和甲基叠氮化物 (MesN 3 )。这种反应性在配位添加剂 4-叔丁基吡啶 ( t BuPy)的存在下受到抑制,可能是通过形成四配位配合物t Bu LFe(HCCPh)( t BuPy)。这些见解有助于确定允许铁催化剂周转的反应条件。
Isolation and Reactivity of an Iron Azametallacyclobutene Complex
作者:Corey A. Richards、Nigam P. Rath、Jamie M. Neely
DOI:10.1021/acs.organomet.2c00151
日期:2022.7.25
reaction of a transition metal imide complex and an alkyne substrate to generate an azametallacyclobutene intermediate. This type of reactivity has been primarily limited to early transition metals like zirconium and titanium. Herein, we describe the preparation of an iron azametallacyclobutene complex by [2 + 2] cycloaddition of a β-diketiminate iron imide complex and an internal alkyne, 1-phenyl-1-propyne
Mössbauer, Electron Paramagnetic Resonance, and Crystallographic Characterization of a High-Spin Fe(I) Diketiminate Complex with Orbital Degeneracy
作者:Sebastian A. Stoian、Ying Yu、Jeremy M. Smith、Patrick L. Holland、Emile L. Bominaar、Eckard Münck
DOI:10.1021/ic050321h
日期:2005.7.1
structure of the low-coordinate, high-spin Fe(I) compound LFe(HCCPh) (L = HC(C[tBu]N[2,6-diisopropylphenyl])2]-), 1, are reported. Low-temperature Mossbauer and electron paramagnetic resonance (EPR) spectroscopies reveal that the electronic ground state is a Kramers doublet with uniaxial magnetic properties (effective g values g(x) = 8.9, 0 < g(y), g(z) < 0.3) that is well isolated from the excited states
低配位,高自旋Fe(I)化合物LFe(HCCPh)(L = HC(C [tBu] N [2,6-二异丙基苯基])2]-)的合成和X射线结构,1被报道。低温Mossbauer和电子顺磁共振(EPR)光谱显示电子基态是具有单轴磁性的Kramers双重态(有效g值g(x)= 8.9,0