Table 1
C
absorption frequencies ν (in cm-1) in different environments, Ne, Ar matrixes, and gas phase at 5 K, and corresponding integrated molar absorptivity in Ne ANe (in km mol-1).
| Mode | νNeb | νArb | νGas | ANe | |
| (cm-1) | (cm-1) | (cm-1) | (km·mol-1) | ||
|
|
|||||
C |
comb.a | 1547.0 | 1545 | 1547.6 | 2 ± 0.2 |
| C |
T1u(4) | 1432.1; 1430.1 | 1432.5; 1429.3 | 1431 | 11 ± 1 |
| C |
T1u(3) | 1184.8 | 1184.9 | 1184.8 | 10.4 ± 0.8 |
| C |
T1u(2) | 577.8 | 578.8 | 577.5 | 11 ± 0.9 |
| C |
T1u(1) | 530.4 | 529.8 | 530.6 | 27 ± 2 |
|
|
|||||
C |
E1u(17) | 1557.6 | 1558.1 | 1557.4 | 33 ± 9 |
| C |
E1u(15) | 1405.3 | 1408.3 | 1404.4 | 70 ± 19 |
| C |
E1u(14) | 1331.1 | 1331.5 | 1331.0 | 20 ± 5 |
| C |
A2u(7) | 1223.2 | 1223.2 | 1223.2 | 6 ± 2 |
| C |
E1u(12) | 1218.1 | 1219.1 | 1217.8 | 11 ± 3 |
| C |
E1u(10) | 958.2 | 958.2 | 958.2 | 4 ± 1 |
| C |
E1u(7) | 785.7 | 784.8 | 786.0 | 4 ± 1 |
| C |
E1u(5) | 580.0 | unclear | 1.6 ± 1 | |
| C |
A2u(2) | 529.7 | unclear | 20 ± 5 | |
| C |
E1u(3) | 526.6 | 526.3 | 527.7 | 7 ± 2 |
| C |
E1u(2) | 398.5; 395.0 | 398.3; 395.1 | 398.6; 395.0 | 10 ± 3 |
| C |
E1u(1) | 347.2 | 348.1 | 346.9 | 5 ± 2 |
|
|
|||||
C |
Eu(28) | 1546.1 | 1542.2 | 1547.3 | 16 ± 4 |
| C |
Eu(25) | 1385.5 | 1386.9 | 1385.1 | 128 ± 14 |
| C |
Eu(24) | 1351.6 | 1344.2 | 1353.9 | 5 ± 1.5 |
| C |
Eu(23) | 1333.6 | 1334.8 | 1333.2 | 8 ± 3 |
| C |
Eu(19) | 1200.7 | 1202.5 | 1200.1 | 16 ± 4 |
| C |
A2u(10) | 1175.6 | 1176.5 | 1175.3 | 1.3 ± 0.5 |
| C |
Eu(17) | 964.3 | unclear | 0.9 ± 0.4 | |
| C |
Eu(11) | 729.2 | 728.5 | 729.4 | 6 ± 2 |
| C |
A2u(4) | 576.4 | 577.8 | 576.0 | 8 ± 3 |
| C |
Eu(8) | 575.3 | 576.6 | 574.9 | 39 ± 4 |
| C |
Eu(3) | 397.2 | 397.3 | 397.2 | 0.8 ± 0.3 |
|
|
|||||
C |
E1u(17), | 1565.5 | 45 ± 18 | ||
| C |
A2u(9) | 1562.1; 1559.9 | 25.5 ± 10 | ||
| 1556.7; 1552.5 | |||||
| C |
E1u(15) | 1396.4 | 50 ± 20 | ||
| C |
E1u(14) | 1323.1; 1322.6 | 8 ± 3 | ||
| 1320.6 | |||||
| C |
E1u(13) | 1307.3; 1304.8 | 12 ± 5 | ||
| 1302.7 | |||||
| C |
A2u(7) | 1278.3; 1275.2 | 11 ± 4 | ||
| C |
E1u(12) | 1232.3; 1230.6 | 7 ± 3 | ||
| 1228.5 | |||||
| C |
E1u(11) | 1168.9 | 1 ± 0.5 | ||
| C |
A2u(5) | 974.1; 972.7 | 5 ± 2 | ||
| C |
E1u(10) | 952.9; 951.7 | 8 ± 3 | ||
| C |
A2u(2), | 525.7 | 2 ± 1 | ||
Notes. Gas-phase values were obtained by extrapolation of matrix data (see main text, Sect. 3.1). In several cases, IR absorption features of C in Ar matrix (increased FWHM relative to Ne matrix) could not be clearly distinguished from overlapping C60 absorptions. These cases are designated as unclear.
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