Results 181 to 190 of about 32,729 (203)
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Structural phase transformations in C70
Journal of the Chemical Society, Chemical Communications, 1992Powder X-ray diffraction shows that on sublimation, solvent free C70 crystallizes in a hexagonal close packed (HCP1) arrangement with small admixture of a second hexagonal close placked (HCP2) phase as well as a face centred cubic (FCC) phase, the proportions of which are progressively transformed by annealing in vacuo at 300 °C via HCP2 to FCC.
M. A. Green +3 more
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ChemInform Abstract: C70 Fulleryl Radicals.
ChemInform, 1995AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
A. LAPPAS, K. VAVEKIS, K. PRASSIDES
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Crystal structure of solid C70
Pramana, 1993Detailed analysis of the room temperature X-ray powder diffraction data of pure solid C70 is reported. C70 prepared by slow evaporation from toluene solution adopts an hcp structure (space groupP63/mmc) witha=10·53(1) A andc=17·24(1) A. C70 sublimed on to Si wafer adopts an fcc structure witha=14·89(1) A.
M C Valsakumar +10 more
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Vibrational mode frequencies in C70
Chemical Physics Letters, 1993Abstract Raman scattering measurements yielding 26 vibrational mode frequencies, along with their depolarization ratios, are reported. A force-constant model, originally developed for C 60 , is extended to C 70 and is shown to result in good agreement with these measurements using two adjustable parameters to fit 26 observed Raman and 16 infrared ...
R.A. Jishi +6 more
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Chemical Physics Letters, 1994
Abstract The infrared absorption intensity of a C 70 molecule is calculated by a semi-empirical molecular orbital calculation library, mopac93. Geometrical optimization for C 70 is obtained by the MNDO and PM3 methods. The calculated molecular vibration frequencies of C 70 at the optimized geometry are shifted to higher frequency by about 15.5 ...
Y. Shinohara +4 more
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Abstract The infrared absorption intensity of a C 70 molecule is calculated by a semi-empirical molecular orbital calculation library, mopac93. Geometrical optimization for C 70 is obtained by the MNDO and PM3 methods. The calculated molecular vibration frequencies of C 70 at the optimized geometry are shifted to higher frequency by about 15.5 ...
Y. Shinohara +4 more
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ChemInform Abstract: Biscyclopropanation of C70.
ChemInform, 1995AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
C. BINGEL, H. SCHIFFER
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Thermodynamic properties of fullerite C70
Technical Physics Letters, 2017A new expression for the isochoric heat capacity and the equation of state of fullerite C70 are obtained in the framework of a quantum-statistical method. Analogs of the Debye law and Dulong–Petit law for this fullerite are formulated. Fullerene C70 molecules are modeled by isotropic quantum oscillators under the assumption that their nonsphericity ...
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Magnetic Properties of TDAE-C70
AIP Conference Proceedings, 2005The 1H and 13C NMR as well as the X‐band and high‐field EPR spectra of TDAE‐C70 are compared with those of TDAE‐C60. The observation of a weak temperature dependent high‐field EPR line below 50 K may be connected with the occurrence of a ferromagnetic modification of TDAE‐C70 in addition to the well known paramagnetic one.
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2005
Sazetak abstracta: Kekule structures of C70 are analyzed and classified.
Vukičević, Damir, Randić, Milan
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Sazetak abstracta: Kekule structures of C70 are analyzed and classified.
Vukičević, Damir, Randić, Milan
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