Alkenes as Chelating Groups in Diastereoselective Additions of Organometallics to Ketones [0.03%]
共轭二烯烃作为配位基在酮对有机金属的非对映选择性加成反应中的应用研究
Ludovic Raffier,Osvaldo Gutierrez,Gretchen R Stanton et al.
Ludovic Raffier et al.
Alkenes have been discovered to be chelating groups to Zn(II), enforcing highly stereoselective additions of organozincs to β,γ-unsaturated ketones. 1H NMR studies and DFT calculations provide support for this surprising chelation mode. T...
Synthesis of Tungsten Imido Alkylidene Complexes that Contain an Electron-Withdrawing Imido Ligand [0.03%]
一种含吸电子基亚胺配体的钨亚氨基烯烃配合物的合成
Jonathan C Axtell,Richard R Schrock,Peter Müller et al.
Jonathan C Axtell et al.
Tungsten NArR alkylidene complexes have been prepared that contain the electron-withdrawing ArR groups 2,4,6-X3C6H2 (ArX3, X = Cl, Br), 2,6-Cl2-4-CF3C6H2 (ArCl2CF3), and 3,5-(CF3)2C6H3 (Ar(CF3)2). Reported complexes include W(NArR)2Cl2(dme)...
Synthesis of Molybdenum and Tungsten Alkylidene Complexes That Contain Sterically Demanding Arenethiolate Ligands [0.03%]
含空间位阻苯硫基配体钼和钨亚烯烃配合物的合成
Erik M Townsend,Jakub Hyvl,William P Forrest et al.
Erik M Townsend et al.
Imido alkylidene complexes of Mo and W and oxo alkylidene complexes of W that contain thiophenoxide ligands of the type S-2,3,5,6-Ph4C6H (STPP) and S-2,6-(mesityl)2C6H3 (SHMT = S-hexamethylterphenyl) have been prepared in order to compare t...
Potent Half-Sandwich Iridium(III) Anticancer Complexes Containing C∧N-Chelated and Pyridine Ligands [0.03%]
含C∧N螯合和吡啶配体的高效半夹层铱(III)抗肿瘤配合物
Zhe Liu,Isolda Romero-Canelón,Abraha Habtemariam et al.
Zhe Liu et al.
We report the synthesis and characterization of eight half-sandwich cyclopentadienyl IrIII pyridine complexes of the type [(η5-Cpxph)Ir(phpy)Z]PF6, in which Cpxph = C5Me4C6H5 (tetramethyl(phenyl)cyclopentadienyl), phpy = 2-phenylpyridine a...
Anion-Dependent Switch in C-X Reductive Elimination Diastereoselectivity [0.03%]
阴离子控制的C-X还原消除反应立体选择性切换机制研究
Michael J Geier,Marzieh Dadkhah Aseman,Michel R Gagné
Michael J Geier
Reaction of a complex Pt organometallic species with electrophilic halogen sources in the presence of X- ligands changes the mechanism of reductive elimination from a concerted reductive coupling type to an SN2 type reductive elimination. I...
Mechanistic Evaluation of the Ni(IPr)2-Catalyzed Cycloaddition of Alkynes and Nitriles to Afford Pyridines: Evidence for the Formation of a Key η1-Ni(IPr)2(RCN) Intermediate [0.03%]
镍(ι-PR)_2催化炔烃和腈类化合物环加成制吡啶反应的机理研究：形成关键的η1-镍(ι-PR)_2(RCN)中间体的证据
Ryan M Stolley,Hung A Duong,Janis Louie
Ryan M Stolley
A detailed mechanistic evaluation of the Ni(IPr)2-catalyzed [2+2+2]-cycloaddition of diynes and nitriles was 2 conducted. Through kinetic analysis of these reactions, observed regioselectivities of the products, and stoichiometric reactions...
Synthesis of Stable Gold(III) Pincer Complexes with Anionic Heteroatom Donors [0.03%]
含有异原子供体的稳定的金(III)钳形配合物的合成
Miles W Johnson,Antonio G DiPasquale,Robert G Bergman et al.
Miles W Johnson et al.
A series of gold(III) complexes supported by pyridine-based bis(amidate), bis(carboxylate), and bis(iminothiolate) substituents is reported. These compounds represent rare examples of pincer-ligated gold(III) centers with multiple anionic h...
Platinum-Catalyzed Reduction of DMF by 1,1,3,3-Tetramethyldisiloxane, HMeSi2OSiMe2H: New Intermediates HSiMe2OSiMe2OCH2NMe2 and HSiMe2(OSiMe2)3OCH2NMe2 and Their Further Chemical Reactivity [0.03%]
铂催化1,1,3,3-四甲基二硅氧烷HMeSI2OSIMe2H还原DMF：新中间体HSiMe2OSiMe2OCH2NMes和HSiMe2(OSiMe2)3OCH2NMes及其进一步的化学反应活性
Jorge L Martinez,Hemant K Sharma,Renzo Arias-Ugarte et al.
Jorge L Martinez et al.
The use of Karstedt's catalyst to study the reduction of Me2NCHO (DMF) by the popular "dual SiH"-containing tetramethyldisiloxane, HMe2SiOSiMe2H (1), has revealed that the first step in the process involves an initial single hydrosilylation...
Functionalization of Complexed N2O in Bis(pentamethylcyclopentadienyl) Systems of Zirconium and Titanium [0.03%]
含氮氧化物配合物的官能团化反应：锆、钛双五甲基环戊二烯体系中的研究
Daniel J Mindiola,Lori A Watson,Karsten Meyer et al.
Daniel J Mindiola et al.
Methyl triflate reacts with the metastable azoxymetallacyclopentene complex Cp*2Zr(N(O)NCPhCPh), generated in situ from nitrous oxide insertion into the Zr-C bond of Cp*2Zr(η2-PhCCPh) at -78 °C, to afford the salt [Cp*2Zr(N(O)N(Me)CPhCPh)...
Photofragmentation of Gas-Phase Lanthanide Cyclopentadienyl Complexes: Experimental and Time-Dependent Excited-State Molecular Dynamics [0.03%]
气相 lanthanide cyclopentadienyl 复合物的光解离：实验与时间依赖激发态分子动力学计算
Jiangchao Chen,Andrew M Hochstatter,Dmitri Kilin et al.
Jiangchao Chen et al.
Unimolecular gas-phase laser-photodissociation reaction mechanisms of open-shell lanthanide cyclopentadienyl complexes, Ln(Cp)3 and Ln(TMCp)3, are analyzed from experimental and computational perspectives. The most probable pathways for the...