Electronic Resource
College Park, Md.
:
American Institute of Physics (AIP)
The Journal of Chemical Physics
113 (2000), S. 895-898
ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
A high resolution infrared absorption spectrum of the ionic complex N2(centered ellipsis)Ar+(centered ellipsis)N2 has been observed by tunable diode laser spectroscopy through a supersonic planar plasma. Seventy-six rovibrational transitions were measured involving excitation of the antisymmetric NN (ν3) stretching fundamental. The band origin is at 2288.7272(2) cm−1 and the ground state rotational constant is determined as B0=0.034 296(7) cm−1. The spectrum shows a clear spin-statistical intensity alternation and is consistent with a linear and centrosymmetric equilibrium geometry and a ground state with 2Σu+ symmetry. The charge is predominantly located on the argon atom. The assignment is supported by high level ab initio calculations carried out. The best estimate for the equilibrium geometry is Re(NN)=1.1014 Å and re(Ar(centered ellipsis)N)=2.3602 Å, yielding Be=0.034 297 cm−1. The equilibrium dissociation energy De for fragmentation into N2 and [ArN2]+ is calculated to be ∼1.7 eV. © 2000 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.481868
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