A ZnII complex with an aldehyde group hydrolyzed porcine pancreatic elastase under mild conditions, pH 8.0, 50 degrees C, by the Schiff base formation between the ZnII complex and the NH2 group in the protein, suggesting that a ZnII compound can be active toward peptide hydrolysis when it strongly binds to the substrate.

The asymmetric unit of the title complex, [Zn3(C7H5O2)6(C6H4N2)2], contains one half of the complex mol-ecule, i.e. one and a half ZnII cations, three benzoate (Bnz) and one pyridine-3-carbo-nitrile (Cpy) mol-ecule; the Bnz anions act as bidentate ligands through the carboxyl-ate O atoms, while the Cpy ligand acts as a monodentate N(pyridine)-bonding ligand. The complete centrosymmetric trinucl...

Cyclic glyoxalcarbohydrazone[(1,2,4,5,8,9,11,12-octaazacyclotetradeca-5,7,12,14tetraene-3,10-dione) = (glyozalcarbzH)2] complexes of Ni II, PdII, CoII, ZnII and CdII of composition M (glyoxalcarbzH)2X2nH2O (M = Ni II, PdII, CoII,ZnII or CdII and X = Cl> , 1/2 SO4 -2 and n = 0,1 or 4) have been isolated by refluxing appropriate metal salts with glyoxal and carbohydrazide in requisite proportion ...

In the title polymeric ZnII complex, [Zn2(C10H4O8)Cl2(C20H14N4)2] n , the ZnII cations are bridged by both 2,5-di-carb-oxy-benzene-1,4-di-carboxyl-ate dianions and 4'-(pyridin-3-yl)-4,2':6',4''-terpyridine ligands, forming ladder-like polymeric chains propagating along [1-10]. The Cl- anion further coordinates the ZnII cation to complete a distorted tetra-hedral environment. In the 4'-(pyridin-...

Nitrite-to-NO transformation is of prime importance due to its relevance in mammalian physiology. Although such a one-electron reductive at various redox-active metal sites (e.g., Cu and Fe) has been illustrated previously, the reaction [ZnII] site presence sacrificial reductant like thiol reported be sluggish poorly understood. Reactivity [(Bn3Tren)ZnII–ONO](ClO4) (1), nitrite-bound model trip...

The title ZnII complex, [Zn(NCS)2(C20H21N3)], has been characterized by synchrotron single-crystal diffraction and FT-IR spectroscopy. The central ZnII ion has a distorted square-pyramidal coordination geometry, with three N atoms of the chiral (S) 1-phenyl-N,N-bis-[(pyridin-2-yl)meth-yl]ethanamine (S-ppme) ligand and one N atom of a thio-cyanate anion in the equatorial plane, and one N atom of...

Four novel ZnII coordination polymers, [(ZnCl₂)₂(L)₂]n (1), [(ZnBr₂)₂(L)₂]n (2), and [(ZnI₂)₂(L)₂]n (3) and {[Zn(SCN)₂]1.5(L)₃}n (4), have been synthesized based on 4'-ferrocenyl-3,2':6',3''-terpyridine with ZnII ions and different coordination anions under similar ambient conditions. Their structures have been confirmed using single crystal X-ray diffraction analysis, showing that complexes 1-...

HgII interacting with a naturally ZnII-containing Rad50 protein interface yields HgS4 species, the strongest metal–protein interaction known to date. It also introduces novel manifestation of mechanism prokaryotic and eukaryotic cells. Furthermore, substitution occurring ZnII possibly has an impact on quaternary structure assembly process, thus disrupting DNA-repair mechanisms that engage Mre11...

While MnII complexes meet increasing interest in biomedical applications, ligands are lacking that enable high complex stability and selectivity vs. ZnII, the most relevant biological competitor. We report here two new bispidine derivatives, which provide rigid large coordination cavities perfectly match size of MnII, yielding eight-coordinate with record stabilities. In contrast, smaller ZnII ...