title: High-resolution near-infrared spectroscopy of CH2(+) and its deuterated isotopologues.
abstract: Aiming to provide approximate rotational constants for millimeter wave spectroscopists to identify the corresponding species in space, we have recorded the near-infrared spectra of the methylene cation CH2(+) and its deuterated isotopologues, CD2(+) and CHD+, using a high resolution and high sensitivity spectrometer. Detection of CH2(+) in space will shed light on interstellar chemistry as it is the intermediate between the abundant CH+ and yet to be observed CH3(+), which is important in the formation of larger organic molecules. CH2(+) and its deuterated isotopologues are also of special interest for theoretical studies because of their unique intramolecular dynamics, i.e., the Renner–Teller interaction and quasi-linearity. This paper will discuss several new bands of CH2(+), the Ã(0,5[11],0)0 ← X̃(0,0[0],0)1 and Ã(0,4[11],0)2 ← X̃(0,0[0],0)1 bands of CD2(+), which have been identified and analyzed, and the candidate lines for the Ã(0,4[10],0)1 ← X̃(0,0[1],0)0 band of CHD+, in comparison with the theoretical predictions by Bunker and colleagues.
authors: Department of Chemistry and the Enrico Fermi Institute and ‡Department of Astronomy & Astrophysics, University of Chicago , Chicago, Illinois 60637, United States.
authors: Haiming
authors: H
authors: Wang
authors: Christopher F
authors: CF
authors: Neese
authors: Christopher P
authors: CP
authors: Morong
authors: Maria
authors: M
authors: Kleshcheva
authors: Takeshi
authors: T
authors: Oka