Magnetic, spectral, thermal and structural properties of trans-tetrakis(pyrazole)bischloromanganese(II), trans-hexakis(pyrazole)manganese(II) bisperchlorate and trans-tetrakis(pyrazole)bisaquamanganese(II) bispyrazolebisnitrate

The complexes studied are rather unstable; their magnetic properties are in agreement with this, the paramagnetic susceptibility following the Curie-Weiss law in the temperature range 90–300 K. However, the IR spectra show M-N bands and are influenced by Hydrogen bond formation. The reflectance spec...

Full description

Saved in:
Bibliographic Details
Published in:Thermochimica acta 1988-04, Vol.126, p.187-198
Main Authors: Lumme, Paavo O., Lindell, Eva, Kivimäki, Pirjo-Riitta
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Exact sciences and technology
Infrared spectra
Molecular properties and interactions with photons
Molecular spectra
Physics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The complexes studied are rather unstable; their magnetic properties are in agreement with this, the paramagnetic susceptibility following the Curie-Weiss law in the temperature range 90–300 K. However, the IR spectra show M-N bands and are influenced by Hydrogen bond formation. The reflectance spectra show at least one weak band at about 23500–24200 cm −1 assigned to the 6 A 1g→ 4 A 1g, 4 E g( 4 G) transition. The TG curves, in agreement with the anisotropic temperature factors, coordination and hydrogen bond formation, point to differently strong-bonded pyrazole molecules in the crystal structures. The powder diffraction data of the perchlorate complex are also reported. The results are discussed and compared with previous data obtained for pyrazole complexes.
ISSN:0040-6031
1872-762X
DOI:10.1016/0040-6031(88)87264-2