Far-Infrared Laser Magnetic Resonance Spectroscopic Study of the ν2 Bending Fundamental of the CCN Radical in Its X̃2Πr State

✍ Scribed by Michael D. Allen; Kenneth M. Evenson; David A. Gillett; John M. Brown

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 279 KB
• Volume: 201
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.2000.8075

✦ Synopsis

Bending vibration-rotation transitions between the (010) 2 ⌺ Ϫ and (000) 2 ⌸ r vibronic states of the CCN radical in its ground electronic state have been observed using far-infrared laser magnetic resonance (FIR LMR) spectroscopy. Thirteen FIR laser lines were used to record 769 resonances. The LMR data, combined with previous data, were used to determine vibrational, Renner-Teller, fine-structure, rotational, hyperfine, and molecular g-factor parameters using a least-squares fitting routine. The model used was an N 2 effective Hamiltonian modified to include the Renner-Teller effect explicitly in a 2 ⌸ electronic state. The band origin for the (010) 2 ⌺ Ϫ 4 (000) X ˜2⌸ r transition was determined to be 179.598176 Ϯ 0.000067 cm Ϫ1 . The spin-orbit splitting in the ground state was refined and the complete set of 14 N-hyperfine parameters determined for the first time.