Repozytorium
Wyszukaj
Kolekcje
Inne
Zinc(II) complexes with asymmetric 3,5-substituted 1H-pyrazoles.
Autorzy
Rok wydania
2012
Czasopismo
European Journal of Inorganic Chemistry
Strony
1639-1649
DOI
10.1002/ejic.201101090
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Two new pyrazolate‐based ligands, N′‐[1‐(3‐acetyl‐4‐methyl‐1H‐pyrazol‐5‐yl)ethylidene]‐2‐(hydroxyimino)propanehydrazide (L1) and 5‐[(E)‐1‐(2‐{(E)‐2‐(hydroxyimino}propanoyl}hydrazono)ethyl]‐4‐methyl‐1H‐pyrazole‐3‐carboxylic acid (L2), were synthesized and studied for zinc(II) complexation. A set of pH‐dependent UV/Vis measurements has been performed to determine the complex formation properties of L2. According to the calculations, in solution, L2 forms variously protonated mononuclear (ZnII/L2 = 1:1) and dinuclear (ZnII/L2 = 2:1) complexes. The reaction of the deprotonated ligands with hydrated ZnII salts and slow diffusion of ammonia into the reaction mixtures gave mononuclear [Zn(L1‐2H)(NH3)2]·DMF (1) and trinuclear μ‐pyrazolato‐bridged [Zn3(L2‐3H)2(NH3)5]·4H2O (3). In both complexes, the zinc ions are in the same distorted trigonal‐bipyramidal environment, coordinated to two nitrogen atoms of the ammonia and one oxygen and two nitrogen atoms of the pyrazolate and hydrazide groups. The molecular structures of all of the ligands and complexes have been elucidated by X‐ray crystallography.
Słowa kluczowe
N, O ligands, Zinc, structure elucidation
Adres publiczny
https://doi.org/10.1002/ejic.201101090
Strona internetowa wydawcy
Podobne publikacje
Evidence of ligand elasticity occurring in temperature-, light-, and pressure-induced spin crossover in 1D coordination polymers [Fe(3ditz)3]X2 (X = ClO4-, BF4-).
Weselski Marek D., Książek Maria, Kusz Joachim, Białońska Agata, Paliwoda Damian, Hanfland Michael, Rudolf Mikołaj F., Ciunik Zbigniew, Bronisz Robert
Synthesis, spectroscopic and structural properties of uranyl complexes based on bipyridine N-oxide ligands.
Hnatejko Zbigniew, Lis Stefan, Starynowicz Przemysław, Stryła Z.
Synthesis, characterization, and magnetic properties of a series of copper(II) chloride complexes of pyridyliminebenzoic acids.
Buvaylo Elena A., Kokozay Vladimir N., Makhankova Valeriya G., Melnyk Andrii K., Korabik Maria, Witwicki Maciej, Skelton Brian W., Vassilyeva Olga Yu.