(Electrochemical) Properties and Computational Investigations of Ferrocenyl-substituted Fe<sub>3</sub>(μ<sub>3</sub>-PFc)<sub>2</sub>(CO)<sub>9</sub> and Co<sub>4</sub>(μ<sub>4</sub>-PFc)<sub>2</sub>(CO)<sub>9</sub> Clusters and Their Reduced Species
作者:Marcus Korb、Xianming Liu、Sebastian Walz、Marco Rosenkranz、Evgenia Dmitrieva、Alexey A. Popov、Heinrich Lang
DOI:10.1021/acs.inorgchem.0c00276
日期:2020.5.4
ferrocenyl-functionalized iron and cobalt carbonyl clusters is reported, based on a reaction of FcPCl2 (3) (Fc = Fe(η5-C5H5)(η5-C5H4)) with Fe2(CO)9 and Co2(CO)8, respectively. Therein, nido-Fe3(CO)9(μ3-PFc)2 (4) and nido-Co4(CO)10(μ3-PFc)2 (5) clusters were obtained as the first diferrocenyl-substituted carbonyl clusters with a symmetrical cluster core. Cluster4 shows two reversible one-electron processes
根据FcPCl2(3)(Fc = Fe(η5-C5H5)(η5-C5H4))与Fe2(CO)9和Co2(CO)8的反应,报告了二茂铁基官能化的铁和钴羰基簇的形成。 , 分别。其中,获得了nido-Fe3(CO)9(μ3-PFc)2(4)和nido-Co4(CO)10(μ3-PFc)2(5)簇,这是第一个具有对称簇的二茂铁基取代的羰基簇核心。簇4显示了基于Fc / Fc +氧化还原事件的阳极区域内的两个可逆单电子过程,以及阴极区域的两个过程。所有电子状态的原位IR和电子顺磁共振(EPR)测量证实了基于Fc的氧化和基于核的还原。根据对4和5的结构进行单晶X射线分析的结果 对最高占据分子轨道-最低未占据分子轨道能量,自旋密度,原子-分子离域指数的量子理论和原子电荷进行了计算研究,以解释实验结果。后者揭示了还原后簇核的重组以及在4和5中存在弱的P···P相互作用。由于分布不同,在4的情况下可逆发生的二茂铁基相关的氧化还原过程不存在。
Synthesis and characterisation of ferrocenyl-phosphonic and -arsonic acids
作者:Steven R Alley、William Henderson
DOI:10.1016/s0022-328x(01)00908-1
日期:2001.12
acids FcCH2CH2E(O)(OH)2 [4, E=P; 10, E=As; Fc=Fe(η5-C5H5)(η5-C5H4)] have been synthesized by the reaction of FcCH2CH2Br with either P(OEt)3 followed by hydrolysis, or with sodium arsenite followed by acidification. Reaction of FcCH2OH with (EtO)2P(O)Na gave FcP(O)(OEt)(OH), which was converted to FcCH2P(O)(OH)2 (3) by silyl esterhydrolysis using Me3SiBr–Et3N followed by aqueous work-up. Similarly, the
‘User-friendly’ primary phosphines and an arsine: synthesis and characterization of new air-stable ligands incorporating the ferrocenyl group
作者:William Henderson、Steven R Alley
DOI:10.1016/s0022-328x(02)01575-9
日期:2002.8
with Me3SiCl–LiAlH4 gives the air-stable primary phosphines FcCH2CH2PH2 and the previously reported analogue FcCH2PH2 in high yields. Reduction of 1,1′-Fc′[CH2P(O)(OEt)2] [Fc′=Fe(η5-C5H4)2] and 1,2-Fc″[CH2P(O)(OEt)2] [Fc″=Fe(η5-C5H5)(η5-C5H3)] similarly gives the new primary phosphines 1,1′-Fc′(CH2PH2)2 and 1,2-Fc″(CH2PH2)2, respectively. The arsine FcCH2CH2AsH2, which is also air-stable, has been
A new approach is proposed for ferrocene phosphorylation using α-hydroxylalkylphosphonate as a “masked” phosphorylating agent, by electrochemical reduction of a ferrocene and (Me)2C(OH)P(O)(OC2H5)2mixture at −50 °C.
The group 6 metal mono-, bis- and tris-ferrocenylphosphine complexes [M(CO)5(PH2Fc)] (1a, M = Cr; 1b, M = Mo; 1c, M = W), cis-[M(CO)4(PH2Fc)2] (2a, M = Cr; 2b, M = Mo; 2c, M = W) and fac-[M(CO)3(PH2Fc)3] (3a, M = Cr; 3b, M = Mo; 3c, M = W) [Fc = Fe(η5-C5H4)(η5-C5H5)] were prepared and fully characterised. IR and NMR spectroscopy and single-crystal X-ray diffraction analysis indicate that FcPH2 is as