No abstract

Two N-pyrene based ligands L1 (1-pyrene-CH=N(CH 2 ) 2 -SPh) and L2 (1-pyrene-CH=N(CH 2 ) 2 -SePh) with an imine functionality and a chalcogen donor have been synthesized and characterized using 1 H as well as 13 C NMR spectral techniques. Palladium(II) complexes (1; PdCl 2 À ĸ 2 À L1 and 2; PdCl 2 À ĸ 2 À L2) of L1 and L2 have been prepared, isolated and characterized using NMR and single crystal X-ray diffraction studies. The geometry around Pd is nearly square planar in these complexes and ligands are coordinated to the metal centre in a bidentate (S/ Se, N) mode. The molecular complexes 1 and 2 have been explored as potential catalysts in O À arylation reaction between substituted aryl halides and phenol. Both the complexes showed excellent efficiency towards this coupling and a TON of 990 (maximum TOF 310) has been achieved using 0.1 mol% of catalyst 2. The effect of the nature of chalcogen donor atom (S/Se) on catalytic efficiency of the complexes has been observed as selenium congener was more efficient than sulphur counterpart.

Organoselenium ligands have attracted great attention among researchers during the past two decades. Various homogeneous, heterogeneous and nanocatalytic systems have been designed using such ligands. Though reports on selenium ligated...

First precursor-architecture controlled synthesis of Pd9Te4 and PdTe nanostructures that have potential applications in Suzuki coupling of 4-chlorobenzaldehyde and catalytic reduction of 4-nitrophenol.

No abstract

Monodispersed ultrasmall Pd nanoparticles synthesized utilizing bulky organochalcogen secondary amines as stabilizers and application in Suzuki coupling of aryl chlorides at low catalyst loading.

Organochalcogen compounds have been used as the building blocks for the development of a variety of catalysts which have been studied comprehensively during last two decades for several chemical transformations....

No abstract