ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
The microwave spectrum of the Ar–formamide van der Waals complex has been obtained using a pulsed-nozzle Fourier-transform microwave spectrometer. The rotational constants of the complex are: A=10 725.7524(48) MHz, B=1771.0738(22) MHz, and C=1548.9974 (16) MHz. The complex is shown to be nonplanar with an inertial defect of −6.21 u A(ring)2. The Ar atom is located at 3.62 A(ring) from the center of mass of the formamide unit at Ar–O, Ar–N, and Ar–C distances of 3.55, 3.79, and 3.93 A(ring), respectively. The shortest Ar–H distance is 3.25 A(ring) which is similar to that observed for Ar–vinyl cyanide (3.21 A(ring)). Stark effect and hyperfine analyses yield the following values for the electric dipole moment components and 14N quadrupole coupling constants for the complex: μa=0.922(1) D, μb=3.407(5) D, χaa=−1.164(7) MHz, χbb=1.906(5) MHz, and χcc=−0.742(6) MHz.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.455429
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