Microwave Spectrum and Molecular Constants of Hydrogen Cyanide

Molecular-Beam Maser for the Shorter-Millimeter-Wave Region: Spectral Constants of HCN and DCN

“…Since the relation 11 (C N } DCN" ^DCN^OWN^HCN (13) holds, an independent check of the accuracy of the spectral constants can be made. Substitution of the values found in this study for CBQ)DCN> ( 5 (pHCN> ( C N)HCN into E( l-( 13^ results in the value (CN)DCN = 8.5 kc/sec.…”

“…The J = 0 -* 1 transition of hydrogen cyanide was the first spectral transition to be observed with microwave methods at wavelengths below 4 mm. In the preliminary observations, 12 the frequency was measured with a cavity wave meter only, but shortly thereafter, in 1949, the hyperfine multiplet of the J = 0 -* 1 transition was measured 13 for both HCN and DCN with a precision frequency standard monitored by station WWV. A 30-Mc/ sec error, due to an incorrect choice of frequency markers, was corrected in an erratum.…”

“…A 30-Mc/ sec error, due to an incorrect choice of frequency markers, was corrected in an erratum. 13 Because only the J= 0 -* 1 transition was observed, the centrifugal stretching constant Dj could not be found. The infrared value of Dj = 0.099 Mc/sec was used in calculation of B 0 .…”

Sub-Doppler and Doppler spectroscopy of DCN isotopomers in the terahertz region: ground and first excited bending states (v1v2v3)=(0 1,0)

“…The first laboratory microwave spectra of hydrogen cyanide isotopes have been reported as early as 1950 by Simmons et al [12]. The pure rotational spectra of the linear triatomic HCN isotopes exhibit both widely spaced (B DCN ¼ 36207:4622 MHz) R-branch (DJ ¼ 1) transitions and, in the first excited bending state, socalled direct l-type transitions with DJ ¼ 0.…”

A 1D Coordination Polymer of UF5 with HCN as a Ligand

“…This can be attributed to the quite strong interaction in the niobium compound, leading to a rise in the acidity and thus the formation of the [NbCl 5 CN] − anion . The comparison with the C−N atomic distance in the gas phase (1.157 Å) also points to a rather weak interaction of HCN with UF 5 …”