Premium
Matrix isolation Raman spectra of FeCl 3 and Fe 2 Cl 6
Author(s) -
Givan A.,
Loewenschuss A.
Publication year - 1977
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250060207
Subject(s) - raman spectroscopy , matrix isolation , krypton , force constant , chemistry , molecule , spectral line , dimer , planar , matrix (chemical analysis) , infrared , monomer , infrared spectroscopy , kinetic isotope effect , crystallography , computational chemistry , atomic physics , deuterium , xenon , physics , polymer , optics , computer graphics (images) , organic chemistry , chromatography , computer science , astronomy
Distinct Raman spectra of FeCl 3 and Fe 2 Cl 6 trapped in solid krypton at 20 K are reported. The spectrum of the monomer consisting of four bands at 460.2 cm 1 , 363 cm −1 , 113.8 cm −1 and 68.7 cm −1 is interpreted in terms of a pyramical C 3v molecule. The assignment of these frequencies to ν 3 , ν 1 , ν 4 and ν 2 , respectively, as well as the assumption of a non‐planar geometry, differ from a previous infrared study. Force constants calculations and isotope effects support this conclusion. Third‐law thermodynamic functions are calculated. The D 2h centrosymmetric geometry of the dimer is confirmed, bond stretching modes assigned and stretching force constants calculated.