ISSN:
1434-4475
Keywords:
Ferrous phosphites, coordination sphere
;
Hydrogen bonding
;
Raman spectroscopy
;
IR spectroscopy
;
Magnetic susceptibility
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Ferrous phosphites FeHPO3·3 H2O, FeH2P2O5, FeH4P2O6·1/2 H2O and FeH10P4O12·4 H2O were studied using X-ray powder patterns, thermography, electron reflectance spectroscopy, magnetic susceptibility measurements andRaman and infrared molecular spectra. The results obtained indicate that all the phosphites studied contain an approximately octahedral coordination sphere consisting of oxygen atoms, which produces a weak crystal field around the iron atom. Phosphite FeHPO3·3 H2O contains an HPO3 2− anion with the symmetry decreased from point groupC 3v toC s. Ferrous diphosphite FeH2P2O5 contains a non-linear P−O−P bond with a valence angle of 159°. The hydrogen bonds between the water molecule and the HPO3 2− anion indicate a positive hydratation of the phosphite anion. Medium-strong or strong hydrogen bonds, 258–270 pm long, correspond to mutual interactions of the anions in the crystal lattice of hydrogenphosphites. Hydrogen bonding in hydrogenphosphites causes a decrease in theDq values.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00938363
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