Non-heme Iron(II) Complexes Containing Tripodal Tetradentate Nitrogen Ligands and Their Application in Alkane Oxidation Catalysis
作者:George J. P. Britovsek、Jason England、Andrew J. P. White
DOI:10.1021/ic0509229
日期:2005.10.1
A series of iron(II) bis(triflate) complexes containing tripodal tetradentate nitrogen ligands with pyridine and dimethylamine donors of the type [N(CH(2)Pyr)(3-n)()(CH(2)CH(2)NMe(2))(n)] [n = 0 (tpa, 1), n = 1 (iso-bpmen, 3), n = 2 (Me(4)-benpa, 4), n = 3 (Me(6)-tren, 5)] and the linear tetradentate ligand [(CH(2)Pyr)MeN(CH(2)CH(2))NMe(CH(2)Pyr), (bpmen, 2)] has been prepared. The preferred coordination
一系列铁(II)双(三氟甲磺酸酯)配合物,包含三脚架四齿氮配体与[N(CH(2)Pyr)(3-n)()(CH(2)CH(2))型吡啶和二甲胺供体NMe(2))(n)] [n = 0(tpa,1),n = 1(iso-bpmen,3),n = 2(Me(4)-benpa,4),n = 3(Me( 6)-tren,5)]和线性四齿配体[(CH(2)Pyr)MeN(CH(2)CH(2))NMe(CH(2)Pyr),(bpmen,2)]已制备。这些配合物在固态和CH(2)Cl(2)溶液中的首选配位几何形状从6坐标到5坐标按1到5的顺序变化。在乙腈中,所有配合物的三氟甲磺酸酯配体很容易被置换由乙腈配体组成。复杂的[Fe(1)(CH(3)CN)(2)](2+)在室温下基本低自旋,而吡啶供体较少的配体增加了对高旋转Fe(II)的偏好。吡啶供体的数量和金属中心的自旋态均强烈影响400 nm附近特征性MLC