Molecular structure of protonated cyanogen, HNCCN+, by millimeter-wave spectroscopy

Abstract

The rotational spectra of the four monosubstituted isotopomers of protonated cyanogen HN¹³CCN⁺, HNC¹³CN⁺, H¹⁵NCCN⁺, and HNCC¹⁵N⁺, in the ground vibrational state have been investigated in the spectral region from 130–270 GHz, using a negative glow discharge production method. From the moments of inertia of the five monosubstituted species, including the DNCCN⁺ isotopomer [G. Cazzoli et al., Chem. Phys. Lett. 194, 297 (1992)] and of the parent species HNCCN⁺ [T. Amano and F. Scappini, J. Chem. Phys. 95, 2280 (1991)], the complete r_s structure has been obtained. The alchemy of the ion production has been further improved compared to the previous works.