The ligand N’,N’‐bis(6‐chloropyridin‐3‐yl)pyridine‐2,6‐dicarboxamide (1) in their di‐deprotonated forms have been used to synthesize two new iron (III) 2 and 3 metal complexes. The iron(III) is surrounded by two tridentate ligands for complex 2, and one tridentate ligand for complex 3. Both complexes have been characterized by NMR, UV‐Visible, IR spectroscopy and elemental analysis. The solid‐state structure of 2 was determined by X‐ray diffraction analysis. Both iron complexes were further studied for ethylene polymerization in the presence of co‐catalyst methylaluminoxane (MAO) under various reaction conditions. It was found that the pincer containing complex 3 exhibited good activities for ethylene polymerization at 80 °C, while the bis‐ligated iron complex 2 did not show activity for ethylene polymerization.
1H-Inden-1-ylidene derivatives have been synthesized using a simple and efficient Pd-catalyzed annulation of functionalized (E)-3-(2-bromophenyl) acrylaldehyde with internal alkynes. The proposed mechanism involves an oxidative addition and carbopalladation of an alkyne to generate a vinyl palladium intermediate followed by β-hydrogen elimination. These pre-functionalized indene-based cyclic precursors can be potential bioactive systems for drug discovery and development.
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