M.N. Deo

Analysis of the ν8 band of methylene fluoride

Abstract The high resolution infrared absorption spectrum of the ν 8 band of methylene fluoride has been measured on a BOMEM DA 3.002 Fourier transform spectrometer in the region 1400–1465 cm −1 . More than 900 transitions have been assigned in this A -type band centered at 1435.6355 cm −1 . The data have been combined with the upper state microwave measurements in a weighted least-squares fit to obtain molecular constants for the upper state resulting in an overall standard deviation of 0.0004 cm −1 .

High-resolution FTIR study of the ν4 band of CH2F2

Abstract The infrared absorption spectrum of the ν 4 fundamental band of CH 2 F 2 has been measured in the region 460–600 cm −1 under high resolution. More than 2700 lines have been assigned in this B -type band of the lowest fundamental centered at 528.5 cm −1 . These data have been combined with all available pure rotational measurements on the upper state in a least-squares fit. Accurate values for the band origin and other molecular parameters for the ν 4 state have been obtained which fit the data with an overall standard deviation of 3.7 × 10 −4 cm −1 .

Vacuum Ultraviolet Absorption Spectrum of Difluoromethane Reinvestigated

ABSTRACT The vacuum ultraviolet (VUV) absorption spectrum of difluoromethane (CH2F2) was studied using synchrotron radiation from the storage ring Indus-1, Indore, India. Spectra were recorded in the spectral region 1050–1500 Å (∼8.3–11.8 eV) at a resolution of 1.5 Å. Three absorption band systems were observed in this region. Overall features observed are in good agreement with previously published work. Some discrepancies in assignments of the observed vibronic bands carried out by previous workers have been resolved. The observed bands have been classified in terms of Rydberg series.