The infrared spectrum of isotopically pure (CH2Cl2)-Cl-35 has been recorded at a resolution of 0.0032 cm(-1) (FWHM) in the range 1400-1600 cm(-1) with a Bruker IFS 120 HR Fourier transform spectrometer in Wuppertal. Here we report the full rotational analysis of the v(4) + v(8) combination band and of the 2v(4) + v(8) - v(4) hot band, which are essentially unperturbed. Excited state constants up to quartic terms have been obtained for both bands and anharmonicity constants involving v(4) and v(8) have been determined. An accurate value for the v(4) band origin has been determined from the v(4) + v(8) combination band and the v(4) + v(8)-v(4) hot band, and successively the anharmonicity constants x(48), x(34), x(49) and x(44) were calculated from hot bands observed in this and previous works. For the (CH2ClCl)-Cl-35-Cl-37 isotopic species, band origins for v(4), v(4) + v(8) and 2v(4) + v(8) have been obtained, by assuming the same anharmonicity constants as for (CH2Cl2)-Cl-35.
High resolution FTIR spectra and analysis of the nu(4)+nu(8) combination band and of the 2 nu(4)+nu(8)-nu(4) hot band of (CH2Cl2)-Cl-35
Snels M;D'Amico G
2003
Abstract
The infrared spectrum of isotopically pure (CH2Cl2)-Cl-35 has been recorded at a resolution of 0.0032 cm(-1) (FWHM) in the range 1400-1600 cm(-1) with a Bruker IFS 120 HR Fourier transform spectrometer in Wuppertal. Here we report the full rotational analysis of the v(4) + v(8) combination band and of the 2v(4) + v(8) - v(4) hot band, which are essentially unperturbed. Excited state constants up to quartic terms have been obtained for both bands and anharmonicity constants involving v(4) and v(8) have been determined. An accurate value for the v(4) band origin has been determined from the v(4) + v(8) combination band and the v(4) + v(8)-v(4) hot band, and successively the anharmonicity constants x(48), x(34), x(49) and x(44) were calculated from hot bands observed in this and previous works. For the (CH2ClCl)-Cl-35-Cl-37 isotopic species, band origins for v(4), v(4) + v(8) and 2v(4) + v(8) have been obtained, by assuming the same anharmonicity constants as for (CH2Cl2)-Cl-35.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
