Results 171 to 180 of about 8,476 (220)

Trifluoromethylation of C70

ECS Meeting Abstracts, 2006
Abstract not Available.
Olga V. Boltalina, Eugenii Dorozhkin, Daria Ignatjeva, Alexey Goryunkov, Ilya Ioffe, Pavel Khavrel, Vitaliy Markov, Alexey Streletskiy, Lev Sidorov, Igor Kuvychko, Steven Strauss   +10 more
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Vibrational spectrum of C70

Chemical Physics Letters, 1992
We report the vibrational density of states (VDOS) for the C70 molecule calculated using the recursion method. The Born potential is adopted for calculating the dynamic matrix. The results show that the peak positions of the VDOS for the C70 molecule are in reasonable qualitative agreement with those of Raman and infrared measurements.
Haibo Xia, Qing Jiang, Decheng Tian
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The hydrogenolysis of C60 and C70

Reaction Kinetics and Catalysis Letters, 2003
Temperature-programmed reaction (TPR) of C60 and C70 with H2 was carried out on nickel in order to investigate the thermal stability of the fullerenes in the catalytic hydrogenation. The TPR profiles showed two methanation peaks and the corresponding weight decrease above 420°C, indicating the hydrogenolysis to CH4.
Toshihiko Osaki, Toshiyuki Tanaka, Yutaka Tai   +2 more
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Enthalpy of formation of C70

Journal of Physics and Chemistry of Solids, 1997
Abstract The standard molar enthalpy of formation of C 70 in the crystalline state at 298.15 K has been determined as 2577.8 ± 16.2 kj mol −1 by microcombustion calorimetry.Δ f H m o (C 70 , g ) at 298.15 K was also derived, using literature data for the enthalpy of sublimation, vapour pressure, solid state heat capacity and solid state entropy ...
Hermínio P. Diogo, Manuel E. Minas Da Piedade, Adam D. Darwish, T. John S. Dennis   +3 more
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C70 fulleryl radicals

Journal of the Chemical Society, Chemical Communications, 1994
The C70 fullerene molecule has five distinct addition sites; all five possible C70Mu isomers (Mu muonium, the light isotope of hydrogen) are observed for the first time by muon spectroscopy.
Alexandros Lappas, Konstantinos Vavekis, Kosmas Prassides   +2 more
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Vibrational frequencies of C70

Chemical Physics Letters, 1992
Abstract A vibrational potential function is proposed for C 70 in terms of stretching, bending and non-bonded interactions. The calculated frequencies fit the experimental infrared and Raman active vibrations. The force field is discussed and differences and similarities with previous normal mode calculations are pointed out.
PROCACCI, PIERO, CARDINI, GIANNI, SALVI, PIER REMIGIO, SCHETTINO, VINCENZO   +3 more
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Density functional studies on the endohedral complex of fullerene C70 with tetrahedrane (C4H4): C4H4@C70

Journal of Molecular Modeling, 2012
B3LYP/6-31G(d) hybrid HF/DFT calculations were carried out to determine the structural and electronic properties of the endohedral complex of a C(70) cage with tetrahedrane (C(4)H(4)). It was demonstrated that the formation of the complex is endothermic, with a destabilization energy of 72.56 kcal mol(-1).
Xiao-Yuan, Ren, Cai-Ying, Jiang
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Synthesis and molecular structures of heptafluoropropylated fullerenes: C70(n-C3F7)8, C70(n-C3F7)6O, and C70(C3F7)4

Journal of Fluorine Chemistry, 2010
Abstract Ampoule reactions of C70 with n- and i-C3F7I were carried out at 250–310 °C. Two step HPLC separations allowed the isolation of several C70(n-C3F7)4–8 and C70(i-C3F7)4 compounds. Crystal and molecular structures of C70(n-C3F7)8-V, C70(n-C3F7)6O, C70(n-C3F7)4, and three isomers of C70(i-C3F7)4 have been determined by X-ray crystallography ...
Tatyana Mutig, Erhard Kemnitz, Sergey I. Troyanov   +2 more
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Radical adduct of trichloromethyl to C70: A laser flash photolysis of C70 in carbon tetrachloride

Radiation Physics and Chemistry, 1997
Abstract The addition reaction of trichloromethyl radical to C 70 has been investigated by use of laser flash photolysis. The difference absorption spectrum of radical adduct, [C 70 CCl 3 ], exhibits broad absorption band in the visible region. The rate constant for reaction of trichloromethyl radical with C 70 is determined.
S.D. Yao, W.Z. Lin, Z.R. Lian, W.F. Wang, N.Y. Lin   +4 more
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Organometallic C70 chemistry. Preparation and crystallographic studies of (η2-C70)Pd(PPh3)2 · CH2Cl2 and (C70) · 2{(η5-C5H5)2Fe}

Journal of Organometallic Chemistry, 1999
Abstract Treatment of a solution of C70 with solutions of Pd(PPh3)4 or ferrocene result in the formation of either black–brown (η2-C70)Pd(PPh3)2 · CH2Cl2 or metallic-black C70 · 2{(η5-C5H5)2Fe}, respectively. Crystallographic examination of the palladium complex reveals that the metal is coordinated to the ab bond (a highly pyramidalized 6:6 ring ...
Marilyn M Olmstead, Leijun Hao, Alan L Balch   +2 more
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