Vibrational spectra and normal coordinate analysis of 4,13-diaza-18-crown-6-calcium chloride and bromide complexes

Authors
Trepalin, SV Yarkov, AV Solotnov, AF Raevsky, OA
Citation
Sv. Trepalin et al., Vibrational spectra and normal coordinate analysis of 4,13-diaza-18-crown-6-calcium chloride and bromide complexes, SPECT ACT A, 55(9), 1999, pp. 1715-1720
Citations number
18
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
ISSN journal
13861425 → ACNP
Volume
55
Issue
9
Year of publication
1999
Pages
1715 - 1720
Database
ISI
SICI code
1386-1425(199908)55:9<1715:VSANCA>2.0.ZU;2-A
Abstract
Calcium chloride (CaCl2)-Ca-40, and (CaCl2)-Ca-44 and bromide ((CaBr2)-Ca-4 0,) complexes of 4,13-diaza-18-crown-6 (DA-18C6) were investigated using IR and Raman spectroscopy and normal coordinate analysis (NCA). Calcium isoto pic substitution was used to determine the valence force field of the DA-18 C6-CaCl2, complex (C-2h symmetry). Practically no change in the vibrations of the macrocyclic ligand were observed upon complex formation, indicating the absence of conformational distortion. (C) 1999 Elsevier Science B.V. Al l rights reserved.