title: An easy one-pot synthesis of diverse 2,5-di(2-pyridyl)pyrroles: a versatile entry point to metal complexes of functionalised, meridial and tridentate 2,5-di(2-pyridyl)pyrrolato ligands.
abstract: A wide variety of 2,5-di(2-pyridyl)pyrroles (dppHs) substituted at the C3 and C4 positions of the pyrrole core were obtained by direct condensation of a 2-pyridylcarboxaldehyde (2 equiv), an α-methylene ketone with at least one electron-withdrawing substituent and ammonium acetate. A novel 2,5-di(1,10-phenanthrolin-2-yl)pyrrole was also characterised. The dppHs provide a direct, quick entry to dipyridylpyrrolato (dpp(-) )-metal complexes. The meridial tridentate dpp(-) ligand is a useful anionic analogue of the terpyridyl ligand. The first (dpp)Ru complexes are described; the 3,4-substitution of the central pyrrole significantly perturbs the potentials of the redox processes of these complexes. A [(dpp)Ru(bpy)(MeCN)](+) (bpy=2,2'-bipyridine) complex is an electrocatalyst for the reductive disproportionation of carbon dioxide to carbon monoxide and the carbonate ion.
authors: School of Chemistry, The University of New South Wales, Sydney, NSW 2052 (Australia).
authors: Alex
authors: A
authors: McSkimming
authors: Vera
authors: V
authors: Diachenko
authors: Rachel
authors: R
authors: London
authors: Kiara
authors: K
authors: Olrich
authors: C Jessica
authors: CJ
authors: Onie
authors: Mohan M
authors: MM
authors: Bhadbhade
authors: Martin P
authors: MP
authors: Bucknall
authors: Roger W
authors: RW
authors: Read
authors: Stephen B
authors: SB
authors: Colbran
mesh_terms: D015082:2,2'-Dipyridyl / Q000138:chemical synthesis / Q000737:chemistry; D002384:Catalysis; D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry*; D008024:Ligands; D010084:Oxidation-Reduction; D011758:Pyrroles / Q000138:chemical synthesis* / Q000737:chemistry; D012428:Ruthenium / Q000737:chemistry*
chemical_list: D056831:Coordination Complexes; D008024:Ligands; D011758:Pyrroles; D015082:2,2'-Dipyridyl; D012428:Ruthenium
keywords: N ligands; reduction; synthetic methods; transition metals; tridentate ligands