| Titan's spectroscopic database |
Positions
and intensities of
the strongest bands of diacetylene :
C4H2
|
Absolute Intensity (cm-2atm-1)
at 298 K |
|
|||||
|
Mode |
Vibration |
Position (cm-1) |
This work |
Koops a (1984) |
Khlifi b
(1995) |
|
|
n4 |
CH stretch. |
3332.8 |
476 |
556 ± 24 |
491 ± 12 |
|
|
n5 |
CC stretch. |
2019.8 |
7.1 |
7.6 ± 0.4 |
7.4 ± 0.2 |
|
|
n6+n8 |
Comb. |
1240.7 |
169.0 |
- |
172.1 ± 4 |
|
|
n7+n9 |
Comb. |
701.0 |
10.3 |
- |
11.6 ± 0.4 |
|
|
n8 |
CCH
bend. |
628.0 |
563.2 ± 23 |
703.6 ± 49 |
439.9 ± 11 |
|
|
n9 |
CCC bend. |
220.1 |
60.7± 2.7 |
25.3 ± 1.2 |
- |
|
aconverted from km/mol to cm-2.atm-1
at 298 K
bconverted from T =300 K to T=298 K
References :
KHLIFI
M, PAILLOUS P, DELPECH C, NISHIO M, BRUSTON P, RAULIN F: ABSOLUTE
IR BAND INTENSITIES OF DIACETYLENE IN THE 250-4300 CM(-1) REGION - IMPLICATIONS
FOR TITAN ATMOSPHERE
JOURNAL OF MOLECULAR SPECTROSCOPY 174 (1): 116-122 NOV 1995
KOOPS T, VISSER T, SMIT WM: THE HARMONIC FORCE-FIELD AND ABSOLUTE INFRARED INTENSITIES
OF DIACETYLENE
JOURNAL OF MOLECULAR STRUCTURE 125 (3-4): 179-196 1984
A. Jolly, L. Manceron, F. Kwabia-Tchana, Y. Benilan, M-C. Gazeau : Revised infrared bending mode intensities for diacetylene (C4H2): application to Titan, Planetary and Space Sciences 97, 60-64 (2014).