Table 6.5 Spectroscopic parameters of the RgI 2 complexes, Rg = He, Ne, Ar, Kr
HeI 2
T-shaped
Linear (free-rotor)
D e ,
(1)
cm
−1
R e ,
(2) Å
D 0 ,
(3) cm
−1
R 0 ,
(4)
Å
D e ,
cm
−1
R e , Å
D 0
(3) ,
cm
−1
R 0 , Å
X 38.92
[86]
3.84 [37] 15.51 [86]
16.6 [37]
4.36
[86]
44.28
[86]
4.83 [86]
4.89 [37]
15.72
[86]
16.3
37]
5.34 [86]
B 29.48
[87]
3.96 [87] 12.33 [87]
12.8 [37]
4.58
[87]
12.33
[87]
E 33.2
[88]
4.1 [88]
16.85 [88]
16.7(6)
[37]
14.0(1)
[32]
13.9(1)
[91, 92]
10.8
[89]
NeI 2
X 89 [93] 3.78 [93] 72.4-74.7
[94]
65.4 [33]
69.62 [93]
64 [95]
91 [93] 4.91 [93] 68 [93] 5.01 [93]
B
65.0-67.1
[94]
57.6 [33]
59(1)
[95, 96]
E
73 [95, 96]
ArI 2
X 235
[97]
3.96 [97] 212 [97]
240.5 [98]
268
[97]
5.05 [97] 237.8
[97]
B
3.83 [44] 227 [99]
226.5 [98]
250.3
[98]
E
see
Fig. 6.27
KrI 2
X
320 [100]
B
307 [100]
E
663–683
[100]
(1)—potential well depths
(2)—equilibrium distances corresponding to potential well depths
(3)—binding energies of the lowest vdW levels corresponding to the T-shaped or linear (free-rotor)
complexes
(4)—equilibrium distances corresponding to n = 0 vdW levels
6.3 Van der Waals Complexes
215