Bioinspired CNP Iron(II) Pincers Relevant to [Fe]-Hydrogenase (Hmd): Effect of Dicarbonyl versus Monocarbonyl Motifs in H<sub>2</sub> Activation and Transfer Hydrogenation
作者:Zhu-Lin Xie、Wenrui Chai、Spencer A. Kerns、Graeme A. Henkelman、Michael J. Rose
DOI:10.1021/acs.inorgchem.9b03476
日期:2020.2.17
CNP pincer complexes are reported that are relevant to [Fe]-hydrogenase (Hmd). The dicarbonyl species [(CNHNNHPR2)Fe(CO)2I] [R = Ph, 1; R = iPr, 2] undergoes ligand deprotonation, resulting in the dearomatized complexes of formulas [(CNHNN=PR2)Fe(CO)2] (5 and 6). The crystal structure and 1H31P} NMR spectroscopy of the iodide-bound dearomatized species [Na(18-crown-6)][(CNHNN=PPh2)Fe(CO)2I] (7) showed
Reactions of Fe(CO)<sub>4</sub> with C<sub>2</sub>H<sub>5</sub>I in the Gas Phase: Evidence for the Formation of IFe(CO)<sub>4</sub>(C<sub>2</sub>H<sub>5</sub>), IFe(CO)<sub>3</sub>(η<sup>2</sup>-COC<sub>2</sub>H<sub>5</sub>), and IFe(CO)<sub>4</sub>(COC<sub>2</sub>H<sub>5</sub>)
作者:David L. Cedeño、Eric Weitz
DOI:10.1021/om0492348
日期:2005.3.1
The reaction of C2H5I with photogenerated Fe(CO)4 was followed using time-resolved infrared spectroscopy. Three novel products were detected. On the basis of their carbonyl stretching frequencies, their kinetics, and calculations of their relative energies, these complexes are assigned as IFe(CO)4(C2H5), IFe(CO)3(η2-COC2H5), and IFe(CO)4(COC2H5). Addition of C2H5I to Fe(CO)4 produces IFe(CO)4(C2H5)
使用时间分辨红外光谱跟踪C 2 H 5 I与光生Fe(CO)4的反应。检测到三种新颖产品。在他们的羰基伸缩的频率,它们的动力学,以及它们的相对能量的计算的基础上,这些配合物被指定为IFE(CO)4(C 2 H ^ 5),IFE(CO)3(η 2 -COC 2 H ^ 5) ,以及IFe(CO)4(COC 2 H 5)。在Fe(CO)4中添加C 2 H 5 I会生成IFe(CO)4(C2 ħ 5)作为动力学优选的产品,其随后转换到IFE(CO)3(η 2 -COC 2 H ^ 5),热力学上优选的络合物。IFE(CO)4(COC 2 H ^ 5)是在加入CO至IFE(CO)形成3(η 1 -COC 2 ħ 5),即提出作为共同中间体16电子复杂通往三个产品。IFe(CO)4(COC 2 H 5)衰变动力学的温度依赖性研究),是产品中寿命最长的,表明它以约20 kcal / mol的活化能脱羰。
Organotin reagents for the synthesis of π-allyl, π-cyclopentadienyl, π-indenyl, and other related π-enyl carbonyl derivatives of the transition metals
作者:Edward W. Abel、Stephen Moorhouse
DOI:10.1039/dt9730001706
日期:——
Organotin compounds such as allyltrimethyltin, cyclopentadienyl trimethyltin, indenyltrimethyltin etc., react with a wide variety of metal carbonyl halides and other metal carbonyl compounds to afford the corresponding π-enyl metal carbonyl derivatives. In many cases conditions are very mild and yields are high, thus commending the reactions for extensive synthetic applications. The possible mechanisms