Nuclear spin species, statistical weights, and correlation tables for weakly bound van der Waals complexes

1984 ◽  
Vol 88 (20) ◽  
pp. 4688-4692 ◽  
Author(s):  
K. Balasubramanian ◽  
Thomas R. Dyke
Keyword(s):  
Nuclear Spin ◽  
Van Der Waals ◽  
Van Der Waals Complexes ◽  
Weakly Bound ◽  
Correlation Tables ◽  
Spin Species

Spectra of (H2)2, (D2)2, and H2–D2 Van der Waals Complexes

1974 ◽  
Vol 52 (12) ◽  
pp. 1082-1089 ◽  
Author(s):  
A. R. W. McKellar ◽  
H. L. Welsh
Keyword(s):  
Fine Structure ◽  
Nuclear Spin ◽  
Selection Rule ◽  
Van Der Waals ◽  
Rotational Quantum Number ◽  
Van Der Waals Complexes ◽  
Not Given ◽  
Simple Effect ◽  
Anisotropic Force ◽  
Nuclear Spin Statistics

Spectra due to the Van der Waals complex (H2)2 have been obtained with greatly improved resolution, and analogous spectra of (D2)2 and H2–D2 have been observed. The experiments were conducted with an absorption path of 110 m in a multiple traversal cell at temperatures between 16 and 21 K. The spectra are manifested as fine structure accompanying the single and double H2 (or D2) transitions in the hydrogen (or deuterium) collision induced fundamental band. The observed structure for (H2)2 and H2–D2 can be unambiguously assigned to rotational transitions of the complex governed by the selection rule Δl = ± 1, ± 3, where l is the rotational quantum number of the complex. A detailed analysis must include anisotropic force effects, and is not given here. The spectrum of (D2)2 is complicated, not only by anisotropic force effects, but also by mutual perturbations between the rotational levels of the upper states of corresponding single and double D2 transitions; for this reason, the assignments suggested are somewhat uncertain. An interesting intensity alternation apparent in part of the (D2)2 spectrum is explained as a simple effect of nuclear spin statistics in the pseudodiatomic molecule (D2)2.

Symmetry in (H2)2, (D2)2, (HD)2, and H2–D2 Van der Waals complexes

1979 ◽  
Vol 57 (12) ◽  
pp. 2099-2105 ◽  
Author(s):  
P. R. Bunker
Keyword(s):  
Dipole Moment ◽  
Energy Level ◽  
Symmetry Group ◽  
Electric Dipole ◽  
Nuclear Spin ◽  
Van Der Waals ◽  
Van Der Waals Complexes ◽  
Spin States ◽  
Molecular Symmetry ◽  
Van Der Waals Complex

The molecular symmetry group of the Van der Waals complex (H2)2 or (D2)2 is a group of order 16 called G16. This group is used to symmetry label the rotation–vibration states and the nuclear spin states of the complexes; the nuclear spin statistical weights are also determined. The group is used to classify the terms in the expansion of the dipole moment function and to determine the symmetry restrictions for allowed electric dipole transitions. The complex H2–D2 has a molecular symmetry group of order 8, G8, and (HD)2 a group of order 4, G4; the energy level symmetries, statistical weights, and selection rules for these complexes are also determined.

scholarly journals Observation of scalar nuclear spin-spin coupling in van der Waals complexes

2012 ◽  
Vol 109 (31) ◽  
pp. 12393-12397 ◽  
Author(s):  
M. P. Ledbetter ◽  
G. Saielli ◽  
A. Bagno ◽  
N. Tran ◽  
M. V. Romalis
Keyword(s):  
Nuclear Spin ◽  
Van Der Waals ◽  
Spin Coupling ◽  
Van Der Waals Complexes ◽  
Spin Spin Coupling

Nuclear spin diffusion in a rare spin species

1982 ◽  
Vol 43 (7) ◽  
pp. 1049-1058 ◽  
Author(s):  
M. Goldman ◽  
J.F. Jacquinot
Keyword(s):  
Nuclear Spin ◽  
Spin Diffusion ◽  
Spin Species

scholarly journals How accurate is the determination of equilibrium structures for van der Waals complexes? The dimer N2O⋯CO as an example

2021 ◽  
Vol 154 (19) ◽  
pp. 194302
Author(s):  
Jean Demaison ◽  
Natalja Vogt ◽  
Yan Jin ◽  
Rizalina Tama Saragi ◽  
Marcos Juanes ◽  
...  
Keyword(s):  
Van Der Waals ◽  
Van Der Waals Complexes ◽  
Equilibrium Structures
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