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Lithium Compounds (lithium + compound)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

Nitro-Substituted Aryl Lithium Compounds in Microreactor Synthesis: Switch between Kinetic and Thermodynamic Control,

ANGEWANDTE CHEMIE, Issue 43 2009
Aiichiro Nagaki Dr.
Beeil Dich oder lass Dir Zeit, je nach dem, was Du willst: Mit einer Mikroflussmethode zur Erzeugung und Umwandlung o -, m - und p -Nitro-substituierter Aryllithiumverbindungen konnte selektiv entweder das kinetisch oder das thermodynamisch begünstigte Intermediat genutzt werden. Im gezeigten Beispiel entstand bei einer Verweildauer von 0.06,s bei ,48,°C 1, während eine Verweildauer von 63,s ausschließlich 2 ergab. [source]

Connectivities in molecules by INADEQUATE: recent developments,

MAGNETIC RESONANCE IN CHEMISTRY, Issue 1 2002
J. Buddrus
Abstract The INADEQUATE (Incredible Natural Abundance DoublE QUAntum Transfer Experiment) consists of a pulse sequence which eliminates the NMR signals from isolated spins (spin system A) displaying signals from coupled spins (spin system AX or higher spin systems). It is of great importance when applied to molecules with skeleton elements such as carbon, silicon or tungsten, all of which contain a small percentage of spin-½ isotopes embedded in magnetically inactive isotopes. Analysis of the AX type spectra gives one-bond and long-range coupling constants (see compound 6) and, most important, the connectivity pattern of the skeleton atoms in molecules of unknown structure such as the carbon compounds 1 or 2, the silicon compound 3 or the lithium compound 4b. Unfortunately, INADEQUATE is rather insensitive, in the case of carbon only one out of 104 molecules gives the desired response. Efforts to reduce this drawback are described; recently, a remarkable step forward has been made by concentrating the four lines of an AX spin system to just two signals (see Fig. 2). Copyright © 2001 John Wiley & Sons, Ltd. [source]

Intermetallic lithium compounds with two- and three-dimensional polyanions,synthesis, structure, and lithium mobility

HETEROATOM CHEMISTRY, Issue 6 2002
Rainer Pöttgen
Intermetallic lithium compounds are potential candidates as anode materials for battery applications. We report on the synthesis, crystal structures, and chemical bonding of lithium,transition metal,stannides and indides. These structures are composed of two- or three-dimensionally infinite polyanions formed by the transition metal and tin (indium) atoms. Besides the crystal chemistry we report on magnetic properties, 7Li solid state NMR, and 119Sn Mössbauer spectroscopy data in order to elucidate structure-property relations for this family of intermetallics. © 2002 Wiley Periodicals, Inc. Heteroatom Chem 13:506,513, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.10095 [source]