Synthesis, Bonding and Reactivity of a Terminal Titanium Alkylidene Hydrazido Compound
作者:Pei Jen Tiong、Laura R. Groom、Eric Clot、Philip Mountford
DOI:10.1002/chem.201203905
日期:2013.3.25
[(Cp*TiMeC(NiPr)2}μ‐OC(NNCPh2)O})2] and the “double‐insertion” dicarboxylate species [Cp*Ti‐MeC(NiPr)2}OC(O)N(NCPh2)C(O)O}] through an initial [2+2] cycloaddition product [Cp*TiMeC(NiPr)2}N(NCPh2)C(O)O}], the congener of which could be isolated in the corresponding reaction with CS2. The reaction with isocyanates or isothiocyanates tBuNCO or ArNCE (Ar=Tol or 2,6‐C6H3iPr2; E=O, S) gave either complete
我们报告的TiNNCPh的反应进行了详细研究2亚烷基酰肼官能团在混合[Cp *钛的MeC(N我PR)2 }(NNCPh 2)](8)与各种不饱和的和饱和的基材。由[Cp * Ti MeC(N i Pr)2 }(N t Bu)]和Ph 2 CNNH 2制备化合物8。DFT计算用于确定接合的TiNNCPh的性质2在部分8和在先前报道的[Cp 2的Ti(NNCPh 2)(PME 3)]。的反应8与CO 2给出二聚体[(Cp * Ti MeC(N i Pr)2 } μ-OC(NNCPh 2)O})2 2 ]和“双插入”二羧酸盐物种[Cp * Ti- MeC( ñ我PR)2 } OC(O)N(NCPH 2)C(O)O}]通过初始[2 + 2]环加成产物的[Cp *钛的MeC(N我PR)2 } N(NCPH 2)C(O)O}],其同源物可在与CS 2的相应反应中分离。与异氰酸酯或异硫氰酸酯的反应t
Synthesis and Reactivity of Silyl and Silylene Ligands in the Coordination Sphere of the 14-Electron Fragment Cp*(<sup>i</sup>Pr<sub>3</sub>P)Os<sup>+</sup>
作者:Paul B. Glaser、T. Don Tilley
DOI:10.1021/om040062o
日期:2004.11.1
Oxidative addition reactions of the 16-electron half-sandwich osmiumcomplex Cp*(iPr3P)OsBr (2) with SiH4 and primary and secondary hydrosilanes were examined. Compared to the previously studied rutheniumcomplex Cp(iPr3P)RuCl (1), 2 exhibits a greater tendency to add hydrosilanes to afford stable, isolable silyl complexes. Using an abstraction−migration methodology, in which abstraction of a labile
检查了16电子半三明治-络合物Cp *(i Pr 3 P)OsBr(2)与SiH 4以及伯氢硅烷和仲氢硅烷的氧化加成反应。与先前研究的钌配合物Cp(i Pr 3 P)RuCl(1)相比,2具有更大的添加氢硅烷的趋势,从而提供稳定的,可分离的甲硅烷基配合物。使用抽象迁移方法,其中先提取不稳定的金属卤化物配体,然后从硅向金属中心进行1,2-H迁移,然后制备了新的sil甲硅烷基络合物。因此,将2衍生的甲硅烷基络合物与LiB(C 6F 5)4得到[Cp *(i Pr 3 P)(H)2 Os SiRR'] [B(C 6 F 5)4 ]类型的阳离子甲硅烷基络合物(R =芳基,甲硅烷基; R'=芳基,H)。甲硅烷基络合物的低场29 Si化学位移范围为316 ppm(R = 2,4,6- i Pr 3 C 6 H 2,R'= H; 18)至417 ppm(R = Si(SiMe 3)3, R'= H; 1
Synthesis and Structure of PNP-Supported Iridium Silyl and Silylene Complexes: Catalytic Hydrosilation of Alkenes
作者:Elisa Calimano、T. Don Tilley
DOI:10.1021/ja903737j
日期:2009.8.12
silylene complexes [(PNP)(H)Ir=SiR(H)][B(C(6)F(5))(4)] (R = Trip (12), Dmp (13)) exhibiting downfield (29)Si NMR resonances (234 ppm (12), 226 ppm (13)) and downfield (1)H NMR resonances for the Si-H group (10.76 ppm (12), 9.76 ppm (13)). Thermallystable disubstituted silylene complexes [(PNP)(H)Ir=SiPh(2)][A] (A = (-)B(C(6)F(5))(4) (14), (-)CB(11)H(6)Br(6) (16)) were isolated via hydride abstraction
Interligand H⋯Si interactions in tungsten silyl trihydride complexes
作者:Meg E. Fasulo、T. Don Tilley
DOI:10.1016/j.jorganchem.2010.11.046
日期:2011.3
The dichloride complex Cp∗(Am)WCl2 (1, Am = [(iPrN)2CMe]−) reacted with the primary silanes PhSiH3, (p-tolyl)SiH3, (3,5-xylyl)SiH3, and (C6F5)SiH3 to produce the W(VI) (silyl)trihydrides Cp∗(Am)W(H)3(SiHPhCl) (2), Cp∗(Am)W(H)3(SiHTolylCl) (3), Cp∗(Am)W(H)3(SiHXylylCl) (4), and Cp∗(Am)W(H)3[SiH(C6F5)Cl] (5). In an analogous manner, 1 reacted with PhSiH2Cl to give Cp∗(Am)W(H)3(SiPhCl2) (6). Complex 6
Organolutetium Complexes in σ-Bond Metathesis Reactions Involving Silicon. Catalysts for the Hydrogenolysis of Si−C Bonds
作者:Ivan Castillo、T. Don Tilley
DOI:10.1021/om010709u
日期:2001.12.1
The lutetium hydride complex [CP*(2)Lu(mu -H)](2) (1) efficiently cleaves the Si-C bond of PhSiH(3) to produce benzene and cross-linked polysilanes (SiH(x))(y). The Si-C bond cleavage appears to proceed via the lutetium phenyl complex CP*(2)LuPh (2). This is supported by the reaction of PhSiH3 with 2, which results in the formation of benzene. Moreover, activation of the Si-C bond of C(6)F(5)SiH(3) by 1 yields the related lutetium aryl Complex CP*(2)LuC(6)F(5) (4) and oligosilanes. The reaction of 1 with o-MeOC(6)H(4)SiH(3), on the other hand, results in the formation of dihydrogen and the neutral lutetium silyl complex CP*(2)LuSiH(2)(o-MeOC(6)H(4)) (5). The solid-state structure of 5 was determined by X-ray crystallography, Reactions of arylsilanes with the lutetium methyl complex [CP*(2)LuMe](2) (3) are less selective than the corresponding reactions of 1 and lead to competitive Si-C and Si-H bond activations. Complex 1 acts as an efficient catalyst for organosilane hydrogenolysis. Thus, addition of excess phenyl- or hexylsilane to solutions of 1 under an atmosphere of dihydrogen at 75 degreesC results in formation of benzene or hexane, respectively, along with cross-linked polysilanes.