Mononuclear Iron(II) Dicarbonyls Derived from NNS Ligands – Structural Models Related to a “Pre‐Acyl” Active Site of Mono‐Iron (Hmd) Hydrogenase
作者:Keren A. Thomas Muthiah、Gummadi Durgaprasad、Zhu‐Lin Xie、Owen M. Williams、Christopher Joseph、Vincent M. Lynch、Michael J. Rose
DOI:10.1002/ejic.201403013
日期:2015.4
[R = quinoline (Q), ClPh] afforded complex salts of the form [(RNNS)Fe(CO)2Br][Fe(CO)3(Br)3] (4-COFe and 5-COFe, respectively). Alternatively, the metalation of the RNNS ligands (for all R ≠ H) with [Fe(CO)4(Br)2] in Et2O at room temperature reliably affords the complex species of type [(RNNS)Fe(CO)2Br][Fe(CO)3(Br)3] (2-COFe, 3-COFe, 5-COFe). The metalation reactions of RNNS at only moderately low temperatures
我们报告了源自三齿、邻位取代的席夫碱吡啶/硫醚配体 (RNNS) 的二羰基铁配合物的合成和表征。RNNS (R = CH3, OCH3) 在低温 (–78 °C) 与 [Fe(CO)4(Br)2] 的金属化反应提供了所需的配合物 [(RNNS)Fe(CO)2Br]Br (2- COBr、3-COBr)。在类似条件下与空间要求更高的配体 [R = 喹啉 (Q), ClPh] 进行反应,得到 [(RNNS)Fe(CO)2Br][Fe(CO)3(Br)3] (4-COFe) 形式的络盐和 5-COFe)。或者,室温下在 Et2O 中用 [Fe(CO)4(Br)2] 对 RNNS 配体(对于所有 R ≠ H)的金属化可靠地提供 [(RNNS)Fe(CO)2Br][ Fe(CO)3(Br)3](2-COFe、3-COFe、5-COFe)。RNNS 仅在中等低温(–20 至 0 °C)下的金属化反应会导致