Now showing items 1-10 of 18
A convenient synthesis of substituted [gamma]-pyrones
(Elsevier, 1980)
An efficient and general synthetic method for various 2-mono- and 2,6-disubstituted [gamma]-pyrones has been developed. This utilizes the -acylation (70-85%) of [beta]-methoxy-[alpha],[beta]-enone lithium enolates by acid ...
Thermal resistivity of layered 4He films on ZYX graphite below 2 K
(Elsevier, 1980-04-01)
Thermal resistance and vapor pressure isotherms were taken near superfluid onset for ultra-thin helium films adsorbed on a ZYX graphite wafer between 1-2 K and 3-7 atomic layers. Our data are consistent with previous ...
Thermophysics of the lanthanide hydroxides I. Heat capacities of La(OH)3, Gd(OH)3, and Eu(OH)3 from near 5 to 350 K. Lattice and Schottky contributions
(Elsevier, 1980-01)
From values of the heat capacity of microcrystalline La(OH)3, Gd(OH)3, and Eu(OH)3 determined by precise adiabatic calorimetry from near 10 to 350 K, the Schottky contribution associated with the low-lying J-manifolds of ...
Aromatic antimony compounds. Transition metal complexes of 2,5-dimethylstibacyclopentadienyl
(Elsevier, 1980-12-23)
Hydrostannation of 2,4-hexadiyne with dibutyltin dihydride gave 1,1-dibutyl-2,5-dimethylstannole, which was converted to 2,5-dimethylstibacymantrene and to bis(2,5-dimethylstibacyclopentadienyl)iron.
Direct determination of selected metals in refractory powder micro samples with exploding thin film excitation
(Elsevier, 1980)
The direct determination of metallic elements in powder micro samples is explored. Emphasis is placed on refractory materials prepared as alcoholic suspensions of their powders. Silver thin films are vacuum deposited on ...
Hydroxylation and expoxidation reactions catalyzed by synthetic metalloporphyrinates. Models related to the active oxygen species of cytochrome P-450
(Elsevier, 1980-02)
Iodosylbenzene has been found to react with catalytic amounts of synthetic metalloporphyrinates to give epoxides and alcohols from olefins and alkanes. Tetraphenylporphinatoiron(III) chloride (TPPFeCl) catalyzed the ...
The novel synthesis of a [6:5:6] linear isoguanosine type tricyclic nucleoside using carbonyl sulfide
(Elsevier, 1980)
The novel one-step synthesis of a fused pyrimidin-2-one-4-thione derivative from an -aminonitrile using carbonyl sulfide is described.
Thermophysics of the lanthanide trihydroxides II. Heat capacities from 10 to 350 K of Nd(OH)3 and Tb(OH)3. Lattice and Schottky contributions
(Elsevier, 1980-04)
Heat capacities have been measured from near 7 to 350 K for Nd(OH)3 and Tb(OH)3 and the derived thermophysical properties evaluated using previously reported heat capacities at lower temperatures. At 298.15 K the values ...
The heat capacity of NH4Br from 265 to 550 K the II-to-I transition
(Elsevier, 1980-08)
The heat capacity of NH4Br has been measured from 265 to 550 K by precision adiabatic calorimetry. The results of these measurements were combined with existing low-temperature results to give thermodynamic functions up ...
A new high-pressure recycle-flow calorimeter and results of determinations with ethane
(Elsevier, 1980-02)
A new recycle-flow calorimeter is described with which the thermodynamic properties of fluids can be determined between pressures of 2 to 20 MPa and temperatures of 90 to 400 K. Precise control of both flowrate and pressure ...