The Utility of Sodium Diisopropylamide (NADA): Formation of a New Transition Metalate via Silyl Migration Chemistry, [(η<sup>5</sup>-Me<sub>3</sub>SiC<sub>5</sub>H<sub>4</sub>)Fe(CO)(PPh<sub>3</sub>)]<sup>−</sup>Na<sup>+</sup> (SiFpPNa), and Resulting Thermal Rearrangements of the Complexes SiFpP−CH<sub>2</sub>SiMe<sub>2</sub>R (R = H, SiMe<sub>3</sub>) to SiFpP−SiMe<sub>2</sub>CH<sub>2</sub>R
作者:Teresita Munguia、Zaynab A. Bakir、Francisco Cervantes-Lee、Alejandro Metta-Magana、Keith H. Pannell
DOI:10.1021/om9006032
日期:2009.10.12
pairs Fe−CO−M; in the presence of coordinating solvents and ionophores the separated ion pairs formed led to the expulsion of the PPh3 and CO scavenging led to formation of the dicarbonylferrate [(η5-Me3SiC5H4)Fe(CO)2]−M+. Hexane was the solvent of choice for formation and use of the ferrates. Reactions of the new ferrates with MeI led to [SiFpP]CH3, whereas reactions with ClCH2SiMe2R (R = H, SiMe3) did
一种新的过渡金属化系统中,[(η 5 -Me 3的SiC 5 ħ 4)的Fe(CO)(PPH 3)] -中号+ ;,经治疗的合成(SiFpPM M =锂,钠)(η 5 -C 5 H 5)Fe(CO)(PPh 3)SiMe 3与钠和二异丙基氨基锂(MN(i Pr 2); NADA和LDA)。NADA的效用远优于LDA,反应时间更短,试剂浓度更低,产率更高。新型高铁酸盐的红外光谱分析表明,它们的稳定性和实用性取决于紧密离子对Fe-CO-M。在配位溶剂的存在和离子载体形成导致PPH驱逐分离的离子对3和CO清除导致形成dicarbonylferrate的[(η 5 -Me 3的SiC 5 ħ 4)的Fe(CO)2 ] -中号+。己烷是形成和使用高铁酸盐的首选溶剂。新高铁酸盐与MeI的反应生成[SiFpP] CH 3,而与ClCH 2 SiMe 2 R(R = H,SiMe 3)的反应未生成预期的Fe-C键合配合物[SiFpP]