Molecules and Radicals Series

20B9

With the advent of modern instruments and theories, a considerable amount of spectroscopic information has been collected on molecules during this last decade. The infrared, in particular, has seen extraordinary activity. Using Fourier transform interferometers and infrared lasers, accurate data have been measured, often with extreme sensitivity. These data have also been analyzed and accurate molecular parameters determined. Volume II/20, "Molecular Constants mostly from Infrared Spectroscopy", is a recent Landolt-Bornstein publication series. It is made up of several subvolumes (A, B, C, D) with comprehensive compilation of critically evaluated molecular constants of diatomic (A), linear triatomic (B), other triatomic (C) and other polyatomic (D) molecules. The first subvolume, II/20B1, published in 1995, deals with 39 linear triatomic molecules and their + + isotopic species, from BClH (HBCl ) to COSe (OCSe), given in the alphabetical order of their Hill's formulas as indicated below: + + 1 BClH (HBCl ) 9 BeF2 (FBeF) 17 CCaN (CaNC) 25 CHN (HNC) 33 CMgN (MgCN) + + + + 2 BClH (BClH ) 10 CBaN (BaCN) 18 CClN (ClCN) 26 CHO (HCO ) 34 CMgN (MgNC) + + + + ? ?
3 BClO (OBCl) 11 CBaN (BaNC) 19 CClN (ClCN) 27 CHO (HOC) 35 CNO (NCO ) + + 4 BFH (HBF ) 12 CBeN (BeCN) 20 CClP (ClCP) 28 CHP (HCP) 36 CNS (NCS) + + ? ? 5 BFO (FBO) 13 CBeN (BeNC) 21 CFN (FCN) 29 CHS (HCS) 37 CNS (NCS )

20C2

Molecular Constants Mostly from Infrared Spectroscopy

by Guy Guelachvili and Nathalie Picque

Published 8 February 2019

The present subvolume provides evaluated infrared spectroscopic data on O₃(Ozone) and is dedicated to all available molecular constants in the electronic ground state, of the 18 isotopomers. It is made of separate chapters. The first one succinctly reports molecular theories and equations, based on which most of the evaluated data given in the other chapters are established. Title of each data chapter indicates which data is reported (vibrational states, vibrational energy, band centers, harmonic frequencies, anharmonic constants, rotational and centrifugal distortion constants, resonance coupling constants, potential energy function, force constants, dipole transition moment, integrated band intensity, line shape parameters…). The isotopic identification, the natural isotopic abundance, and the cited bibliographic references are also given in each data chapter.

20D

Polyatomic Molecules

by Nathalie Picque

Published 7 October 2022

20B2a

16o12c16o

by Guy Guelachvili and K Narahari Rao

Published 16 January 1997

Volume II/20 provides critically evaluated data on free molecules, obtained from infrared spectroscopy and related experimental and theoretical investigations.
The volume is divided into four subvolumes, A: Diatomic Molecules, B: Linear Triatomic Molecules, C: Nonlinear Triatomic Molecules, D: Polyatomic Molecules.
The present subvolume II/20 B2 Degrees contains data for 16O12C16O. Subvolume II/20 B2ss containing data for CO2 isotopomer and Subvolume B3 containing data for CS2 ... N3, and further subvolumes are in preparation.