Synthesis of {Me2Si-η5-C5H4Fe(CO)[P(OR)3]Me2Si-η5-C5H4Fe(CO)[P(OR)3]} via selective CO-substitution of [Me2Si-η5-C5H4Fe(CO)2Me2Si-η5-C5H4Fe(CO)2] by P(OR)3 (R=Ph, nBu, nPr, Et, and Me) under photochemical condition and molecular structure of trans-{Me2Si-η5-C5H4Fe(CO)[P(OMe)3]Me2Si-η5-C5H4Fe(CO)[P(OMe)3]}
作者:Huailin Sun、Xuebin Huang、Zhong Hu、Yuxin Ma、Jian Yang
DOI:10.1016/s0022-328x(00)00455-1
日期:2000.10
e(CO)2] (2) in the presence of P(OR)3 leads to regioselective substitution of two CO groups at different iron centers to give Me2Si-η5-C5H4Fe(CO)[P(OR)3]Me2Si-η5-C5H4Fe(CO)[P(OR)]3]} [R=Ph (3); nBu (4); nPr (5); Et (6); and Me (7)]. Complexes 3–7 are mixtures of cis and trans isomers in ratios of ca. 1:1.4, as determined by 1H-NMR spectra. Both isomers of 3 and 7 were isolated by exploiting their
的紫外线照射[我2的Si-η 5 -C 5 H ^ 4的Fe(CO)2我2的Si-η 5 -C 5 H ^ 4的Fe(CO)2 ](2)在P(OR)的存在下3个引出两个CO基团的区域选择性取代在不同的铁中心,得到我2的Si-η 5 -C 5 H ^ 4的Fe(CO)[P(OR)3 ]我2的Si-η 5 -C 5 H ^ 4 Fe(CO)[P(OR)] 3 ]}[R = Ph(3); n Bu(4); n Pr(5);等(6); 和我(7)]。配合物3 – 7是顺式和反式异构体的混合物,比例约为ca。由1 H-NMR光谱确定为1:1.4 。的两种异构体3和7通过而只有利用其不同的溶解度分离反式对得到的异构体4,5和6。的分子结构的反式- 7通过X射线衍射确定。结果表明,P(OMe)3在铁中心的配位导致(0.036Å)缩短,从而增强了双键Fe gemCO(1.725(3)Å)配位键,
Novel Rearrangement Reactions. 6. Thermal Rearrangement of Disilyl-Bridged Diiron Complexes Containing Isocyanide Ligands and Stereochemistry of the Rearranged Products
xylene, three different rearranged products [(Me2Si)(η5-C5H4)Fe(CO)L1}(Me2Si)(η5-C5H4)Fe(CO)L2}] (L1 = L2 = CO (2); L1 = C6H11NC, L2 = CO (7), L2 = C6H11NC (9); L1 = t-BuNC, L2 = CO (8), L2 = t-BuNC (10)) were obtained. Similarly, thermal treatment of 6t afforded three different cis rearranged products, 11c, 12c, and 13c, while treatment of 6c yielded three different trans rearranged products, 11t, 12t
(ME的治疗2 SiSiMe 2)[(η 5 -C 5 H ^ 3 - [R 1)的Fe(CO)] 2(μ-CO)2(R 1 = H(1)中,R 1 =吨-Bu(5) )其中R 2 NC(R 2 = C 6 H ^ 11,吨-Bu在苯,得到异氰化物取代物[(η)5:η 5 -C 5 H ^ 3 - [R 1我2 SiSiMe 2 ç5 H 3 R 1)Fe 2(CO)(CNR 2)(μ-CO)2 ](R 1 = H,R 2 = C 6 H 11(3),R 2 = t -Bu(4); R 1 = R 2 = t -Bu(6))。进一步的研究表明,顺式底物5c仅提供顺式产物(6c),而反式底物5t仅提供反式产物(6t)。当3和4,在二甲苯中加热分别,三种不同的重排的产物[(ME 2 Si)的(η 5 -C 5 H ^ 4)的Fe(CO)L- 1 } (ME 2 Si)的(η 5 -C 5 H
Synthesis, structure and properties of hexamethyltrisilane-bridged biscyclopentadienyl tetracarbonyl di-iron
The reaction of hexamethyltrisilane-bridged biscyclopentadiene C5H5(SiMe2)3C5H5 with Fe(CO)5 in refluxing xylene gave corresponding di-iron complexes (SiMe2)3[η5-C5H4Fe(CO)]2(μ-CO)2 (1) together with the (Me2SiSiMe2)[η5-C5H4Fe(CO)]2(μ-CO)2 (2) and [Me2Si(η5-C5H4)Fe(CO)2]2 (3). The crystal structure of 1 was determined by X-ray diffraction. The formation of the latter two products was discussed. Studies
六甲基桥连的biscyclopentadiene C的反应5 ħ 5(森达2)3 Ç 5 ħ 5为Fe(CO)5在回流的二甲苯,得到相应的二-铁络合物(森达2)3 [ η 5 -C 5 H ^ 4的Fe( CO)] 2(μ -CO)2(1)与(ME一起2 SiSiMe 2)[ η 5 -C 5 H ^ 4的Fe(CO)] 2(μ-CO)2(2)和[我2的Si(η 5 -C 5 H ^ 4)的Fe(CO)2 ] 2(3)。的晶体结构1通过X射线衍射确定。讨论了后两种产品的形成。研究的UV光谱1和2,并与我2的Si [ η 5 -C 5 H ^ 4的Fe(CO)] 2(μ -CO)2(4)表示的SiSi债券协调环戊二烯基的连接导致显著红移λ最大为的UV光谱1和2。的电化学1,2和4也进行了研究。
The thermal rearrangement of [Me2Si-η5-C5H4(CO)Fe(CO)2Fe(CO)-η5-C5H4SiMe2] in the presence of phosphorus ligands
作者:Huailin Sun、Xiangdang Teng、Xuebin Huang、Zhong Hu、Yanbin Pan
DOI:10.1016/s0022-328x(99)00639-7
日期:2000.2
Reaction of [Me2Si-η5-C5H4(CO)Fe(CO)2Fe(CO)-η5-C5H4SiMe2] (1) with one equivalent of PR3 in refluxing p-xylene for 9 h leads to rearranged products containing mainly [Me2Si-η5-C5H4Fe(CO)2SiMe2-η5-C5H4Fe(CO)PR3] (3: R=OMe; 4: R=OPh) and a small amount of [Me2Si-η5-C5H4Fe(CO)2SiMe2-η5-C5H4Fe(CO)2] (2). When excess of PR3 is used and/or the time of reaction is shortened, an intermediate product
的反应[我2的Si-η 5 -C 5 H ^ 4(CO)的Fe(CO)2的Fe(CO)-η 5 -C 5 H ^ 4森达2 ](1)与一当量的PR 3在回流的p二甲苯9所小时导致重排的含产品主要[我2的Si-η 5 -C 5 H ^ 4的Fe(CO)2森达2 -η 5 -C 5 H ^ 4的Fe(CO)PR 3 ](3:R = OMe; 4:R = OPH)和少量[我2的Si-η 5 -C 5 H ^ 4的Fe(CO)2森达2 -η 5 -C 5 H ^ 4的Fe(CO)2 ](2)。当过量的PR的3被使用和/或反应的时间缩短,中间产物[我2的Si-η 5 -C 5 H ^ 4(CO)的Fe(CO)2的Fe(PR 3)-η 5 - C 5 H 4 SiMe 2 ](5:R = OMe; 6:R = OPh)由反应获得。发现在导致3和4的热条件下5和6的重排比1快得多。3和5
Synthesis of Me2 iMe2 and a novel reaction between its SiSi and FeFe bonds
作者:Huailin Sun、Shansheng Xu、Xiuzhong Zhou、Honggen Wang、Ruji Wang、Xinkan Yao
DOI:10.1016/0022-328x(93)83094-c
日期:1993.2
Me2Si-eta5-C5H4(CO)Fe(CO)2Fe(CO)-eta5-C5H4SiMe2 (1) was synthesized by reaction of 1,2-bis(cyclopentadienyl)tetramethyldisilane and pentacarbonyliron. An unexpected product, Me2Si-eta5-C5H4 Fe(CO)2SiMe2-eta5-C5H4Fe(CO)2 (2), was obtained from the reaction, which was evidently formed via a novel metathesis reaction between Si-Si and Fe-Fe bonds in 1. The molecular structures of 1 and 2 were determined by single-crystal X-ray diffraction studies.