Six olefin metathesis catalysts, based on a common ruthenium precursor featuring hydroxy-substituted N-heterocyclic carbene ligand, were successfully prepared and fully characterised. As proof-of-concept, two of them ([Ru]isonico [Ru]dmab) directly immobilised solid support. These non-covalently heterogenised catalysts are efficient in different reactions sufficiently stable to be used for repe...

A wide range of research activities have been carried out so far on benzimidazole and pyridine derivatives to evaluate their Antiviral, Anticancer, Anticonvulsant, Anthelmintic Activity and many promising results are obtained with respect to the anticancer activity. Out of the various ligands used, the alkylating agents are found to be highly active with respect to cancer chemotherapy. Nitrogen...

Ni(II), Cu(II), and Zn(II) complexes of the tridentate heterocyclic ligand, 2-(phenyl(pyridin-2-yl)methylene)hydrazine-1-carbothioamide (HL) have been synthesized characterized by various spectroscopic techniques elemental analyses. Infrared spectroscopy shows that ligand coordinates to metal ions through azomethine pyridine nitrogen atoms as well sulfur atom thioamide group form a chelate syst...

The mechanism (or mechanisms) of enthalpy-entropy (H/S) compensation in protein-ligand binding remains controversial, and there are still no predictive models (theoretical or experimental) in which hypotheses of ligand binding can be readily tested. Here we describe a particularly well-defined system of protein and ligands--human carbonic anhydrase (HCA) and a series of benzothiazole sulfonamid...

In the title compound, {[Ag(C(12)H(11)N(3)O)]NO(3)·H(2)O}(n), the Ag atom is coordinated by two N atoms from the heterocyclic ligand, giving a linear polycationic chain. Two long Ag⋯O(nitrate) inter-actions [2.667 (3) and 2.840 (3) Å] result in a three-dimensional network. The water mol-ecule consolidates the network structure by forming hydrogen bonds, one to the polycationic chain and one to ...

Several ppm level gold-catalyzed reactions enabled by the ligand HandaPhos can be performed at room temperature in aqueous nanoreactors composed of the surfactant Nok. Variously substituted allenes undergo cycloisomerization leading to heterocyclic products in good yields. Likewise, cyclodehydration is also illustrated under similar conditions, as is an intermolecular variant, hydration of term...

Dimetal complexes of a new N-heterocyclic carbene/phenanthroline ligand have been synthesized. Coordination of both ruthenium and rhenium to the phenanthroline moiety in combination with platinum at the carbene moiety are reported. Steady-state and time-resolved optical absorption and photoluminescence spectra were obtained for the complexes. These results illustrate significant changes occur w...

The first example of a tandem reaction involving double-bond migration in combination with telomerization is reported. Homogeneous and heterogeneous Ru catalysts were employed as isomerization catalysts, and telomerization was realized using a homogeneous Pd(0) precursor complex with a N-heterocyclic carbene (IMes) ligand. Overall conversions approaching 60% were achieved with the best selectiv...