helping to clarify the coordination environment of the cys-bound FeII active site. Reaction of 1 or 2 with O2 at -95 °C leads to S-oxygenation of the abt ligand, and in the case of 2, a rare di(sulfinato)-bridged complex, [Fe2III(μ-O)((2-NH2) p-CF3C6H3SO2)2](OTf)2 ( 5), was obtained. Parallel enzymatic studies on the CDO variant C93G were carried out with the abt substrate and show that reaction with O2
描述了四种新的 FeII(
N4S(thiolate)) 复合物作为
硫醇双加氧酶模型的合成。它们由中性三齿
配体三氮杂
环壬烷 (R3TACN; R = Me, iPr) 和
2-氨基苯硫醇 (abtx; X = H,
CF3) 的衍
生物组成,后者是
硫醇双加氧酶的非天然底物。这些配合物的配位数取决于 TACN 衍
生物的身份,为 FeII(Me3TACN)(abtx)(OTf) 提供 6 配位(6-coord)配合物(1:X = H;2:X = )和[FeII(iPr3TACN)(abtx)](OTf) (3: X = H; 4: X = ) 的 5-坐标 (5-coord) 配合物。配合物 1-4 通过 UV-vis、1H/19F NMR 和穆斯堡尔光谱检查,并采用密度泛函理论 (DFT) 计算来支持数据。穆斯堡尔光谱显示,6-coord 1-2 和 5-coord 3-4 表现出不同的光谱,并将这些数据与半胱
氨酸结合的