Results 101 to 110 of about 505 (151)
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Enantioselective Route from Carbohydrates to Cyclooctane Polyols
Organic Letters, 2005[reaction: see text] A synthetic route to select cyclooctane-1,2,3-triols and 1,2,3,4,5-pentaols has been defined. The starting materials are d-glucose or d-arabinose, and the key steps consist of a zirconocene-promoted ring contraction, a [3,3] sigmatropic rearrangement, and more extended functionalization of the resulting cyclooctadienone.
Leo A, Paquette, Yunlong, Zhang
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1.5-Diaza-3.7-diphospha-cyclooctane
Tetrahedron Letters, 1980Abstract The alkyl (aryl)-bishydroxymethylphosphines react with primary amines to give the title compounds. With optically active amines optically active phosphines are formed.
Von G. Märkl, G.Yu Jin, Ch. Schoerner
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The excess enthalpies of cyclooctane + n-alkanes
Thermochimica Acta, 1982Abstract The excess enthalpies of cyclooctane + n -hexane, + n -heptane, + n -octane, + n -dodecane and + n -hexadecane have been measured over the whole composition range at two temperatures. The results, together with previously published excess volume results, have been fitted to the Flory theory of liquid mixtures.
W.L. Spiteri, T.M. Letcher
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Self-diffusion in crystalline hexamethylethane and cyclooctane
Journal of Physics and Chemistry of Solids, 1972Abstract Self-diffusion in the rotationally disordered crystalline phases of hexamethylethane and cyclooctane has been studied by high-resolution NMR linewidth measurements. The measured activation enthalpy for self-diffusion in hexamethylethane is 20·6 kcal/mole, or about twice the triple point sublimation enthalpy (9·33 kcal/mole), and it agrees ...
R.H. Baughman, D. Turnbull
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Ab initio conformational analysis of cyclooctane molecule
Journal of Computational Chemistry, 1998The potential energy surface (PES) for the cyclooctane molecule was comprehensively investigated at the Hartree–Fock (HF) level of theory employing the 3–21G, 6–31G, and 6–31G* basis sets. Six distinct true minimum energy structures (named B, BB, BC, CROWN, TBC, and TCC1), characterized through harmonic frequency analysis, were located on the ...
Willian R. Rocha +5 more
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Structure and conformation of a hetero-substituted cyclooctane
Acta Crystallographica Section C Crystal Structure Communications, 1991C 1 0H 1 4N 2+ 4 .2Br - cristallise dans C2/c avec a=12.7119, b=6.9016, c=14.6312 A, β=105.755 °; affinement jusqu'a R=0.038. Le cycle central a une conformation chaise.
C. Foces-Foces +4 more
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Rotation and pseudorotation in solid cyclooctane
The Journal of Physical Chemistry, 1990Martin J. Lizak +4 more
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Aromatization of Cyclooctane. I
The Journal of the Society of Chemical Industry, Japan, 1956Tsutomu Matsuda +2 more
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