Fluorine-19 nuclear magnetic resonance studies of mixed bis(η6-arene)chromium(0) complexes
作者:H. Ssekaalo、J.J. Lagowski、C.M. Seymour
DOI:10.1016/s0020-1693(00)82999-0
日期:1991.5
conducted on mixed bis(η6-arene)chromium(0) complexes containing (CH3)m (m=1, 2 or 3) substituents in one of the partner arenes and CF3 or Fn, (n=1 or 2) substituents in the other arene. There is deshielding of the 19F in the (C6H6−m(CH3)m)-(C6H5CF3)Cr complex (I) relative to that in (C6H5CF3)2Cr(II). However, increased shielding of 19F is observed in the (C6H6−m(CH3)m)-(C6H6−nFn)Cr complex (III) relative
The thermodynamic properties of bis(η6-o-xylene)chromium(I) fulleride over the temperature range from T → 0 to 340 K
作者:A. V. Markin、V. A. Ruchenin、N. N. Smirnova、G. V. Markin、Yu. A. Shevelev、V. A. Kuropatov、G. A. Domrachev
DOI:10.1134/s0036024409080081
日期:2009.1
The temperature dependence of the heat capacity of bis(eta(6)-o-xylene)chromium(I) fulleride, [(eta(6)-(o-xylene))(2)Cr](+aEuro cent)[C-60](aEuro cent a'), over the temperature range 6-340 K was measured on an adiabatic vacuum calorimeter. The low-temperature (20 K a parts per thousand currency sign T a parts per thousand currency sign 50 K) heat capacity was subjected to multifractal processing; conclusions about the heterodynamic character of the structure were drawn. The experimental data were used to calculate the standard thermodynamic functions C (p) (a similar to) (T), H (a similar to)(T)-H (a similar to)(0), S (a similar to)(T), and G (a similar to)(T)-H (a similar to)(0) over the temperature range from T -> 0 to 340 K and estimate the standard entropy of fulleride formation from simple substances at 298.15 K. The standard thermodynamic characteristics of [(eta(6)-(o-xylene))(2)Cr](+aEuro cent)[C-60](aEuro cent a') were compared with those of the initial fullerene C-60.
Nesmeyanov, A. N.; Iurieva, L. P.; Levchenko, S. N., Doklady Akademii Nauk SSSR, 1970, vol. 19O, p. 118 - 121
作者:Nesmeyanov, A. N.、Iurieva, L. P.、Levchenko, S. N.