Repozytorium
Wyszukaj
Kolekcje
Inne
A bis(μ-phenoxo)-bridged dizinc complex with hydrolytic activity.
Autorzy
Rok wydania
2013
Czasopismo
Zeitschrift für Anorganische und Allgemeine Chemie
Numer woluminu
639
Strony
1534-1542
DOI
10.1002/zaac.201300160
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The dinuclear complex [Zn2(papy)2]· 2CH3OH [H2papy = N‐(2‐hydroxybenzyl)‐N‐(2‐picolyl)glycine] was synthesized and characterized. The crystal structure of the complex reveals that both ZnII ions are pentacoordinate with distorted pentagonal bipyramidal coordination arrangements. The phenoxyl groups of each ligand bridge the two metal atoms, whereas each carboxylate of the ligand is terminally bound to one ZnII ion. Potentiometric studies of the ZnII:H2papy system in a methanol/water mixture show the existence of a mononuclear species at lower pH; but at a pH above 5, a dimeric species starts to dominate and transforms further into a bis(μ‐phenoxo) bridged dizinc complex by deprotonation of phenolic hydrogen. A kinetic study of the hydrolysis of bis(2, 4‐dinitrophenyl)phosphate at different pH, catalyzed by complex 1 , indicates a maximum rate at pH 9, where the bis(μ‐phenoxo)‐bridged dizinc species corresponding to 1 dominates in solution.
Słowa kluczowe
zinc, hydrolases, phosphoester
Adres publiczny
http://dx.doi.org/10.1002/zaac.201300160
Strona internetowa wydawcy
Podobne publikacje
An unsymmetric ligand with a N5O2 donor set and its corresponding dizinc complex: a structural and functional phosphoesterase model.
Das Biswanath, Daver Henrik, Pyrkosz-Bulska Monika, Gumienna-Kontecka Elżbieta, Himo Fahmi, Nordlander Ebbe
Fungal zinc homeostasis - a tug of war between the pathogen and host.
Walencik Paulina K., Wątły Joanna, Rowińska-Żyrek Magdalena
Zinc homeostasis at the bacteria/host interface : from coordination chemistry to nutritional immunity.
Wątły Joanna, Potocki Sławomir, Rowińska-Żyrek Magdalena