- Syntheses of bipyridine-N-oxides and bipyridine-N,N'-dioxides
-
Dimethyldioxirane (DMD) was used to synthesize heterocyclic aromatic N-oxides enabling the product isolation and reaction solutions to be free of potentially dangerous peroxide intermediates. Additionally, this work combines important crystallographic, spectroscopic, and melting point data to shed light on inconsistent literature previously reported for the identity of 2,4'-bipyridine-N'-oxide.
- McKay,Lashlee III,Maina,Wheeler,Brown
-
experimental part
p. 181 - 188
(2010/07/05)
-
- 4,4′-bipyridine-N-monoxide. A hybrid ligand for building networks using a combination of metal-ligand and hydrogen-bonding interactions
-
The ligand 4,4′-bipyridine-N-monoxide, (BIPYMO) coordinates through the pyridine N-donor to Pt(ii) and Pd(ii) to form square planar [ML 4]2+ complexes and to Cu(ii) and Zn(ii) to form octahedral trans-[M(H2O)2L4]2+ complexes. Single crystal X-ray structures show that these individual building blocks are organized via hydrogen bonding through the external N-oxide O-atoms to form 2D and 3D networks. The Royal Society of Chemistry.
- Hoffart, Dennis J.,Habermehl, Nicolle C.,Loeb, Stephen J.
-
p. 2870 - 2875
(2008/02/10)
-
- Novel chiral oxazoline ligands for potential charge-transfer effects in the Rh(I)-catalysed enantioselective hydrosilylation
-
Novel 2-(4,4′-bipyridin-2-yl)oxazolines, bearing a chiral oxazoline moiety, were synthesised starting from 4,4′-bipyridine and selectively monomethylated in the N′-position. After coordination to rhodium these electron-poor ligands are supposed to exhibit charge-transfer effects with electron-donating substrates in the Rh(I)-catalysed enantioselective hydrosilylation (see next publication). Similar effects were expected from 4,4′-bipyridine- and pyrazine-bisoxazolines after complexation with rhodium. For comparison 2-(4-phenylpyridin-2-yl)oxazoline ligands were synthesised. Rh(I)-complexes of selected ligands were prepared and characterised, including an X-ray structure analysis.
- Brunner, Henri,Stoeriko, Reinhard,Rominger, Frank
-
p. 771 - 781
(2007/10/03)
-