Mol-ecules of the title compound [ZnCl(2)(C(7)H(7)NO(2))(2)], are located on a twofold rotation axis. Two 4-amino-benzoic acid moieties, and two chloride ligands are coordinated to a Zn atom in a tetra-hedral fashion, forming an isolated mol-ecule. Neighbouring mol-ecules are linked through hydrogen-bonded carboxyl groups, as well as N-H⋯Cl hydrogen-bonding inter-actions between amine groups an...

Acylation of bis[2-(diphenylphosphino)ethyl]amine provides a flexible synthesis of functionalized chelating diphosphines. This t.uitiott off"rs a route to diphosphine complexes of transition metals having a wide r?n-ge of structures and physical properties and especially to water-soluble complexes. The aqueous solubility of the free ligands and of ttre compleres prepared from them depend on the...

In the title complex, [Ni(C(7)H(4)NO(3)S)(2)(C(3)H(10)N(2))(2)] or [Ni(sac)(2)(pen)(2)] (sac = saccharinate or 1,1,3-trioxo-2,3-dihydro-1λ(6,2)-benzothia-zol-2-ide and pen = propane-1,3-diamine), the Ni(II) ion sits on an inversion center, being coordinated by two N atoms of the sac ligands, which occupy trans positions, and four N atoms of the bidentate pen ligands to define a distorted octa-h...

The conductivity and spectrophotometry techniques were employed to evaluate the binary ternary complexes of divalent metal ions Co(II) Cu(II) with physiologically relevant amino acid L-Valine (Val) analgesic paracetamol. experiments generated by direct equation from titration data, while performed using continuous variations approach (Job's method). Both accomplished in an aqueous solution a co...

A series of mononuclear salen-supported gallium amido/alkoxide derivatives were prepared and structurally characterized and subsequently used as initiators in rac-lactide ring-opening polymerisation (ROP). The reaction of variously substituted salen ligands (1a-1f) with 0.5 equiv. of Ga2(NMe2)6 allowed the isolation of the corresponding (salen)Ga-NMe2 chelates (2b-2d, 2f) via an amine eliminati...

Heteroleptic complexes of strontium () were prepared by employing β-diketonates and donor-functionalized alkoxides as coordinating ligands. The results illustrate the effect of alkoxide substituent groups on the overall structures of the complexes. The presence of a terminal methoxy group in the alkoxide ligands leads to the formation of trimeric complexes , whereas the substituents on the amin...

A common feature of many CYP2C9 ligands is their weak acidity. As revealed by crystallography, the structural basis for this behavior involves a charge-pairing interaction between an anionic moiety on the substrate and an active site R108 residue. In the present study we attempted to re-engineer CYP2C9 to better accept basic ligands by charge reversal at this key residue. We expressed and purif...

HYPOTHESIS Aqueous citrate-stabilized gold nanoparticles (Au NPs) cannot be directly transferred from water to an immiscible organic solution using short alkyl ligands. However, Au NPs can be transferred from water to a water-organic interface if chemical and mechanical inputs are used to modify the interfacial energy and interfacial area. Ligand exchange can then take place at this interface. ...

Schiff's bases are one of the important classes ligands, which obtained by condensation amine and aromatic aldehyde. The metal complexes widely considered because they show excellent biological activities. Such as antimicrobial, antitumor, antibacterial, anti-fungal properties. present studies deal with synthesis characterization base transition synthesized from general formula (ML) M=Co(II) Cu...