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Inne
Crystal structures, spectral and magnetic properties of cobalt(II) pyridinecarboxylates: a novel polymeric chain in {[{2,6-(MeO)2nic}2(H2O)2Co(μ-H2O)Co(H2O)4(μ-H2O)]-{2,6-(MeO)2nic}2·6H2O}n.
Autorzy
Rok wydania
2006
Czasopismo
Numer woluminu
359
Strony
4386-4392
DOI
10.1016/j.ica.2006.07.002
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Synthesis and characterization of two new cobalt(II) complexes, namely monomeric [Co(2-MeSnic)2(H2O)4] · 4H2O (2-MeSnic is 2-methylthionicotinate) and polymeric {[{2,6-(MeO)2nic}2(H2O)2Co(μ-H2O)Co(H2O)4(μ-H2O)]{2,6-(MeO)2nic}2 · 6H2O}n (2,6-(MeO)2nic is 2,6-dimethoxynicotinate), are reported. The characterizations were based on elemental analysis, infrared and electronic spectra as well as magnetic measurements. Crystal structures of both complexes have been determined. In both of them – ([Co(2-MeSnic)2(H2O)4] · 4H2O and {[{2,6-(MeO)2nic}2(H2O)2Co(μ-H2O)Co(H2O)4(μ-H2O)]{2,6-(MeO)2nic}2 · 6H2O}n) – the CoII atom is six-coordinated. In the 2nd complex, there are two nonequivalent CoII central atoms, involved in forming a linear polymeric chain with alternating cationic and neutral part. One of them is octahedrally coordinated by a carboxyl oxygen atom of 2,6-(MeO)2nic, two water molecules and the corresponding centrosymmetrically located atoms. The second CoII atom is also octahedrally coordinated by six water molecules. Both coordination polyhedra are bridged by a water molecule. The charge of the cationic part is compensated for by two independent anionic 2,6-(MeO)2nic units. The structure is held together by a complicated system of hydrogen bonds.
Słowa kluczowe
Crystal structure, Pyridinecarboxylate complexes, Cobalt(II) complexes, Polymeric complexes, Spectral and magnetic properties
Adres publiczny
https://doi.org/10.1016/j.ica.2006.07.002
Strona internetowa wydawcy
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