Now showing items 51-60 of 426
Synthesis and assignments of regioisomeric cyanoimidazole esters
(Elsevier, 1994-02-28)
Regioassignments of ethyl cyanoimidazolecarboxylates have been performed by the nuclear Overhauser effect(NOE) studies on the regioisomeric monocyanoimidazoles obtained by the hydrolysis of the esters followed by ...
Synthesis of (+/-)tylophorine by the intramolecular cycloaddition of an azide with an [omega]-chloroalkene
(Elsevier, 1994)
Cyclization of (Z)-1-(2-chloromethyl)phenyl-5-azidopent-1-ene 10 in benzene at 120[deg]C followed by treatment with sodium borohydride produced 1,2,3,5,10,10a-hexahydropyrrolo[1,2-b]isoquinoline 11 in 71% yield. A similar ...
Thermodynamics of alkali alkanoates X. Heat capacities and thermodynamic properties of lithium methanoate and lithium ethanoate at temperatures from [approximate] 5 K to 580 K
(Elsevier, 1994-12)
Heat capacities of lithium methanoate and ethanoate (CA Registry numbers [556-63-8] and [546-89-4]) have been measured by adiabatic intermittent-heating equilibrium calorimetry from temperatures T near 5 K to 350 K and by ...
Aromatische Borheterocyclen: Erzeugung von 1 H -Borepin und Struktur von Tricarbonyl(1-phenylborepin)molybdÄn Diese Arbeit wurde von der Research Corporation und dem Petroleum Research Fund der American Chemical Society gefÖrdert. Professor William von E. Doering zum 75. Geburtstag gewidmet
(WILEY-VCH Verlag GmbH, 1992-09)
No Abstract.
Hydrazine adsorption and decomposition on the GaAs(100)-c(8 x 2) surface
(Elsevier, 1994-12-20)
Temperature programmed desorption (TPD), X-ray photoelectron spectroscopy (XPS), and high resolution electron energy loss spectroscopy (HREELS) have been used to study the decomposition mechanism of hydrazine (N2H4) on the ...
Non-biomimetic route to deoxyadenosine adducts of carcinogenic polycyclic aromatic hydrocarbons
(Elsevier, 1991-10-21)
Aminotriols are prepared by direct aminolysis of the diol epoxides of polycyclic aromatic hydrocarbons, providing a substantial improvement over literature methods. The condensation of aminotriols with 6-halopurine ...
An evaluation of the rotational barrier about the B---N bond of 1-aminoborepins
(Elsevier, 1994-04-05)
13C NMR spectroscopy has been used to determined the barriers to rotation about the B---N bonds of 1-(N-benzyl-N-methylamino)borepin and 1-(N-benzyl-N-methylamino)-4,5-dihydroborepin as 18 and 19.8 kcal mol-1, respectively. ...
Excitatory amino acidergic pathways and receptors in the basal ganglia
(Springer-Verlag, 1991-10)
The striatum receives the majority of excitatory amino acidergic input to the basal ganglia from neocortical and allocortical sources. The subthalamic nucleus and the substantia nigra also receive excitatory amino acidergic ...
Hydrogen-induced low temperature CO displacement from the Pt(111) surface
(Elsevier, 1990-10-02)
A new low temperature displacement mechanism for CO on the Pt(111) surface has been observed in the presence of high pressures of hydrogen (0.001 to 0.1 Torr H2). Temperature-programmed fluorescence yield near-edge ...
Ab initio force fields of alanine dipeptide in four non-hydrogen bonded conformations
(Elsevier, 1990-03)
We have previously calculated the force fields and dipole-moment derivatives of the L-alanyl dipeptide, CH3CONHCHCH2CONHCH3, in the C5, C7eq, and C7ax conformations with intramolecular NH...OC hydrogen bonding. We have now ...