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Inne
Syntheses, crystal structures and magnetic studies of new manganese(II) coordination polymers with ditopicN -pyridinylisonicotinohydrazide ligand and dicyanamide.
Autorzy
Rok wydania
2016
Czasopismo
Inorganic Chemistry Communications
Numer woluminu
67
Strony
85-89
DOI
10.1016/j.inoche.2016.03.009
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Two new coordination polymers of Mn(II) with dicyanamide anion (dca) and isonicotinohydrazone based ligands, {[Mn2(L1)2(dca)2(CH3OH)2]·H2O}n (1) and [Mn2(L2)2(μ-dca)2]n (2), were synthesized and characterized by elemental analyses and spectroscopic methods where HL1 = (E)-N′-(phenyl(pyridin-2-yl)methylene)isonicotinohydrazide and HL2 = (E)-N′-(1-(pyridin-2-yl)ethylidene)isonicotinohydrazide. The IR spectra of 1 and 2 show the characteristic stretching vibration bands of a dicyanamide ligand as three bands. Structures of the compounds were characterized by X-ray diffraction analysis which indicates that the isonicotinohydrazone ligands act as a ditopic ligand and coordinate to manganese ions via the N2O-donor set and pyridine group of the isonicotine part. The magnetic susceptibility measurements studies indicated the presence of an antiferromagnetic coupling between high spin Mn(II) ions. Antiferromagnetic coupling for 2 is stronger than that of 1 which is due to connection of Mn(II) ions through dicyanamide bridges in the former.
Słowa kluczowe
hydrazone ligands, magnetic behavior, coordination polymers, X-ray crystal structures, manganese polymers
Adres publiczny
http://dx.doi.org/10.1016/j.inoche.2016.03.009
Strona internetowa wydawcy
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