The southern hemisphere at glacial terminations: insights from the Dome C ice core R. Röthlisberger, M. Mudelsee, M. Bigler, M. de Angelis, H. Fischer, M. Hansson, F. Lambert, V. Masson-Delmotte, L. Sime, R. Udisti, and E. W. Wolff British Antarctic Survey, Natural Environment Research Council, Cambridge, UK Climate Risk Analysis, Hannover, Germany Niels Bohr Institute, University of Copenhagen...

Herein we report directed iridium-catalyzed C3−H silylation of furfuryl imines, which grants access to versatile synthetic platforms. This transformation was developed on derivatives, using imines as directing groups, and trialkylsilanes or bis(trimethylsilyl)methylsilane silylating agents, in the presence a hydride scavenger. Subsequently, fluoride-mediated activation strategies were applied C...

Abstract Reduktive Debromierung von {N(SiMe 3 ) 2 }SiBr mit Rieke‐Magnesium führt zu einem 1:1‐Gemisch des fünfkernigen Siliciumclusters Si 5 } Br, 1 , Bromsubstituenten und der Cyclobutadien‐analogen 4 ‐Ringverbindung . Verbindung besitzt einen planaren rautenförmigen ‐Ring ladungsseparierten elektronischen Zustand. Die Siliciumatome in sind alternierend trigonal‐planar ‐pyramidal konfiguriert...

The use of uncertain reasoning techniques have recently been advocated as a means of diagnosing errors in terms of both performance and conceptual understanding (Petrushin & Sinitsa 1993; Martin & VanLehn 1993; Tokuda & Fukuda 1993; Sime 1993). In this paper, we describe an investigation of the utility of a simple uncertain reasoning (Bayesian) technique for the diagnosis of novice Prolog progr...

Bis(imino)diphenylamido rare-earth metal dialkyl complexes [o-(2,6-(i)Pr(2)-C(6)H(3)-N=C-C(6)H(4))(2)-N]Ln(CH(2)SiMe(3))(2) (1: Ln = Sc; 2: Ln = Lu; 3: Ln = Y) have been synthesized in good yields and structurally characterized by elemental analysis, NMR spectroscopy, and single-crystal X-ray diffraction studies. They serve as highly efficient single-component catalysts both for the living ring...

The title compound, [Ru(2)(C(22)H(34)Si(2))(CO)(4)], contains two Ru(I) atoms linked by a bridging (η(5)-(t)BuC(5)H(2))(2)(SiMe(2))(2) ligand ((t)Bu is a tert-butyl and Me is a methyl group) with an Ru-Ru bond length of 2.8401 (7) Å. The dihedral angle between the planes of the cyclo-penta-dienyl rings of the ligand is 123.13 (19)°. The four terminal carbonyl ligands are bound in a symmetrical ...

[Me(2)Si(Cp(Me(2)))(2)]W(H)Cl is obtained via reaction of WCl(6) with a mixture of [Me(2)Si(Cp(Me(2)))(2)]Li(2) and NaBH(4), from which the dichloride [Me(2)Si(Cp(Me(2)))(2)]WCl(2) is obtained via treatment with CHCl(3). [Me(2)Si(Cp(Me(2)))(2)]WCl(2) provides a means to access other ansa tungstenocene compounds, such as [Me(2)Si(Cp(Me(2)))(2)]WH(2), [Me(2)Si(Cp(Me(2)))(2)]WMe(2), and [Me(2)Si(C...