Naslov
Pseudopolymorphism with the two crystal series of the composition [M(bpy)_3]_2[NbO(C_2O_4)_3]Cl&middot ; ; ; nH_2O

Autori
Šestan, Marijana ; Brničević, Nevenka ; Perić, Berislav ; Giester, Gerald ; Planinić, Pavica

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
The 2004 Younger European Chemists' Conference Highlights of European Chemical Research and R&D in 2004 / Wharton, Eric ; Coluccia, Salvatore ; Operti, Lorenza. - Torino, 2004

Skup
The 2004 Younger European Chemists' Conference

Mjesto i datum
Torino, Italija, 25.08.2004. - 29.08.2004

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Pseudopolymorphism; Crystal structure; Polynuclear oxalato complexes; 2; 2'-bipyridine

Sažetak
As the first step in our efforts to synthesize polynuclear molecule-based magnetic compounds, we have isolated the new isostructural series of solids [M(bpy)_3]Cl_2[NbO(C_2O_4)_3]Cl&middot ; ; ; 11H_2O (M=Fe^2+, Co^2+, Ni^2+, Zn^2+) formed from aqueous solutions of [M(bpy)_3]Cl_2 and M'_3[NbO(C_2O_4)_3&middot ; ; ; nH_2O (M'=NH_4^+, alkali metal). All compounds crystallize as needle-like monoclinic crystals, space group P2_1/c. This crystal form is metastable and slowly (2-4 weeks) transforms into more stable polyhedra-like orthorombic crystals of the composition [M(bpy)_3]Cl_2[NbO(C_2O_4)_3]Cl&middot ; ; ; 12H_2O, space group P2_12_12_1). Methods used. IR spectroscopy, powder and single-crystal X-ray diffraction, magnetic susceptibility measurements. The crystal structures have been solved for all compounds and pseudopolymorphism found within pairs of complexes from the two series. Magnetic susceptibility measurements show no difference in magnetic behaviour of two pseudopolymorphs.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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