Thermodynamics of dimer fullerene complex [(Me 3Si) 3C 60] 2 in the range from 0 ⩽ T/K ⩽ 480
In the present work, firstly the temperature dependence of heat capacity C p ,m ∘ = f ( T ) of the crystalline fullerene complex [(Me 3Si) 3C 60] 2 has been measured between T = (6 and 350) K and T = (330 and 480) K by precision adiabatic vacuum and dynamic calorimetry, respectively. The irreversibl...
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| Published in: | The Journal of chemical thermodynamics Vol. 39; no. 5; pp. 798 - 803 |
|---|---|
| Main Authors: | , , , , , , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Elsevier Ltd
01-05-2007
|
| Subjects: | |
| Online Access: | Get full text |
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| Summary: | In the present work, firstly the temperature dependence of heat capacity
C
p
,m
∘
=
f
(
T
)
of the crystalline fullerene complex [(Me
3Si)
3C
60]
2 has been measured between
T
=
(6 and 350)
K and
T
=
(330 and 480)
K by precision adiabatic vacuum and dynamic calorimetry, respectively. The irreversible endothermic effect was detected in the temperature range from
T
=
(400 to 466)
K and its thermodynamic characteristics have been determined and analysed. This transformation was caused by the opening of a dimeric bond between fullerene fragments and the decomposition of the tested complex on heating. The experimental data were used for calculating the standard (
p
∘
=
0.1
MPa) thermodynamic functions
C
p
,m
∘
/
R
,
Δ
0
T
H
m
∘
/
RT
,
Δ
0
T
S
m
∘
/
R
and
Φ
m
∘
/
R
=
Δ
0
T
S
m
∘
/
R
-
Δ
0
T
H
m
∘
/
RT
(where
R is gas constant) in the range 0
⩽
T/K
⩽
400. The value of the standard entropy of formation of the complex from simple substances at
T
=
298.15
K has been estimated. |
|---|---|
| ISSN: | 0021-9614 1096-3626 |
| DOI: | 10.1016/j.jct.2006.10.002 |