Linear Triatomic Molecules: CHSi (HCSi), ClHNe (NeHCl), Cl2H- (ClHCl-), FHO (FHO), FHO+ (FHO+), F2H- (FHF-), FN2 + (FNN+), HN2 + (HNN+), HNSi (HNSi), HOSi+ (HOSi+), N2S (NNS), NOP (PNO), NOSi (NSiO), NOSi (SiNO), NOSi (SiON)

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-Börnstein 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. Energy level designations....Pages 1-2 Effective hamiltonians....Pages 2-7 Formulas for determining rotational constants....Pages 7-13 Potential energy function (PEF)....Pages 13-16 Dipole moment....Pages 16-18 Intensities....Pages 19-34 Renner-Teller effect (some aspects)....Pages 34-35 Some fuctional relations specially applicable to the molecular constants of CO 2 ....Pages 36-47 Some symbolism appearing in N 2 O data....Pages 47-49 Some symbolism appearing in CO 2 + , CFeO, CFeO - , CNN, CNO and CNO - data....Pages 50-57 Some functional relations for CS 2 , CSe 2 and C 2 N....Pages 58-63 Some symbolism appearing in C 2 H....Pages 64-64 List of symbols....Pages 65-70 CHSi (HCSi)....Pages 71-87 ClHNe (NeHCl)....Pages 88-92 ClClH – (ClHCl – )....Pages 93-115 FHO (FHO)....Pages 116-118 FHO + (FHO + )....Pages 119-119 FFH – (FFH – )....Pages 120-136 FNN + (FNN + )....Pages 137-140 HNN + (HNN + )....Pages 141-169 HNSi (HNSi)....Pages 170-186 HOSi + (HOSi + )....Pages 187-191 NNS (NNS)....Pages 192-206 NOP (PNO)....Pages 207-214 NOSi (NOSi)....Pages 215-217 NOSi (SiNO)....Pages 218-221 NOSi (SiON)....Pages 222-225