Now showing items 11-20 of 204
Triple Junction Mobility: A Molecular Dynamics Study
(Kluwer Academic Publishers; Springer Science+Business Media, 1999-11)
We present a molecular dynamics simulation study of the migration of individual grain boundary triple junctions. The simulation cell was designed to achieve steady state migration. Observations of the triple junction angle ...
Thermodynamics of alkali alkanoates IX. Heat capacity and thermodynamic functions of lithium 2-methylpropanoate at temperatures from 7 K to 535 K
(Elsevier, 1993-10)
The heat capacity of lithium 2-methylpropanoate was measured by equilibrium adiabatic calorimetry at temperatures, T from 7 K up to 350 K and by d.s.c. from 330 K through melting to 535 K. A small diffuse hump was observed ...
Selective multiple methylene insertion reactions mediated by iodomethylzine iodide: Mechanistic considerations and synthetic applications
(Elsevier, 1991-04-15)
The reaction of alkynylcoppers 1 with an excess of iodomethylzinc iodide selectively furnishes the quadruple methylene insertion copper organometallics 2 in fair to good yields. The mechanism of the reaction has been ...
Polyhedral liquid crystal silsesquioxanes
(John Wiley & Sons, Ltd., 1999-04)
Synthetic routes towards monodisperse polyhedral liquid-crystalline silsesquioxanes are described. The liquid-crystalline phase behaviour of these structurally uniform materials, with various silsesquioxane core and mesogenic ...
Fluorescence Yield Near Edge Spectroscopy (FYNES) of benzene adsorbed in Na-Y zeolite
(Baltzer Science Publishers, Baarn/Kluwer Academic Publishers; J.C. Baltzer AG, Scientific Publishing Company ; Springer Science+Business Media, 1990-01)
Benzene adsorbed in sodium-Y zeolite has been investigated using Fluorescence Yield Near Edge Spectroscopy (FYNES). These studies demonstrate that FYNES measurements are feasible as a direct probe of the local electronic ...
An intramolecular, Schmidt reaction of an alkyl azide with a carbocation. The generation and rearrangement of a conformationally restricted secondary aminodiazonium ion.
(Elsevier, 1992-09-08)
Treatment of azidoalkene 2 with triflic acid produced the bridged bicyclic enamine 3 by an intramolecular Schmidt reaction. Rearrangement of the intermediate aminodiazonium ion 5 is completely regioselective.
Studies on morpholinosphingolipids: Potent inhibitors of glucosylceramide synthase
(Elsevier, 1994-04-25)
Synthetic 1-morpholino-1-deoxyceramides were designed to inhibit glucosylceramide synthase. The most potent inhibitor 2a possesses the unnatural R,R-configuration of D-threo-sphingosine.
Low-temperature MOCVD of chromium carbonitride coatings from tetrakis(diethylamido)chromium and pyrolysis mechanism of this single-source precursor
(John Wiley & Sons, Ltd., 1998-03)
Amorphous chromium carbonitride coatings with a low nitrogen content (3–8 at%) were deposited by low-pressure MOCVD in the temperature range 573–793 K using Cr(NEt 2 ) 4 as single-source precursor. This poor nitrogen ...
Cyclic siloxanes and silsesquioxanes as cores and frameworks for the construction of ferrocenyl dendrimers and polymers
(John Wiley & Sons, Ltd., 1999-04)
Starting from 1,3,5,7-tetramethylcyclotetrasiloxane as core, novel ferrocenyl silicon-containing dendrimers have been constructed up to the third generation, which contains 16 peripheral ferrocene moieties. As precursors ...