Controlled radical polymerization of vinyl acetate mediated by a vanadium complex

Initiation of the polymerization of vinyl acetate with azobis(isobutyronitrile) in the presence of a vanadium bis(iminopyridine) complex generates vanadium-capped dormant polymer chains with excellent correlation between molecular weight and conversion and good molecular weight distributions.JID: 9610838; 2010/02/17 [aheadofprint]; 2010/03/09 [epublish]; ppublishSource type: Electronic(1

Controlled Radical Polymerization of Vinyl Acetate Mediated by a Bis(imino)pyridine Vanadium Complex

Source type: Prin

Dinuclear molybdenum tetracarbonyl complexes of tetradentate nitrogen ligands and intermolecular hydrogen bonding in the crystal structure of N,N'-bis-(1-(pyridin-2-yl) ethylidene)-ethane-1,2-diamine

Multidentate N-ligands (Schiff bases) were prepared by the condensation of 2-acetylpyridine or 2-benzoylpyridine, and 1,2-diaminoethane or 1,6-diaminohexane (2:1 ratio) in ethanol. These ligands were reacted with $Mo(CO)_6$ to obtain dinuclear metal tetracarbonyl compounds. Both terminal amine groups were seen to form imines from the reaction of mono-ketones with diamines in 2:1 or 1:1 ratios. The structures of these ligands and metal complexes were characterized by elemental analysis, and FT-IR, $^1H$-NMR, $^{13}C$-NMR, and LC-MS spectral techniques. N,N'-bis[1- (pyridin-2-yl)ethylidene]ethane-1,2-diamine, which was obtained by the reaction of 2-acetylpyridine and 1,2-diaminoethane, was also characterized by single crystal X-ray structure analysis. The crystal packing is stabilized by intermolecular H-bonding and $\pi$ − $\pi$ interactions.Multidentate N-ligands (Schiff bases) were prepared by the condensation of 2-acetylpyridine or 2-benzoylpyridine, and 1,2-diaminoethane or 1,6-diaminohexane (2:1 ratio) in ethanol. These ligands were reacted with $Mo(CO)_6$ to obtain dinuclear metal tetracarbonyl compounds. Both terminal amine groups were seen to form imines from the reaction of mono-ketones with diamines in 2:1 or 1:1 ratios. The structures of these ligands and metal complexes were characterized by elemental analysis, and FT-IR, $^1H$-NMR, $^{13}C$-NMR, and LC-MS spectral techniques. N,N'-bis[1- (pyridin-2-yl)ethylidene]ethane-1,2-diamine, which was obtained by the reaction of 2-acetylpyridine and 1,2-diaminoethane, was also characterized by single crystal X-ray structure analysis. The crystal packing is stabilized by intermolecular H-bonding and $\pi$ − $\pi$ interactions

Dinuclear molybdenum tetracarbonyl complexes of tetradentate nitrogen Ligands and intermolecular hydrogen bonding in the crystal structure of N,N '-bis-[1-(pyridin-2-yl)ethylidene]-ethane-1,2-diamine

WOS: 000252247100012Multidentate N-ligands (Schiff bases) were prepared by the condensation of 2-acetylpyridine or 2-benzoylpyridine, and 1,2-diaminoethane or 1,6-diaminohexane (2:1 ratio) in ethanol. These ligands were reacted with Mo(CO)(6) to obtain dinuclear metal tetracarbonyl compounds. Both terminal amine groups were seen to form imines from the reaction of mono-ketones with diamines in 2:1 or 1:1 ratios. The structures of these ligands and metal complexes were characterized by elemental analysis, and FT-IR, H-1-NMR, C-13-NMR, and LC-MS spectral techniques. N,N '-bis[1-(pyridin-2-yl)ethylidene]ethane-1,2-diamine, which was obtained by the reaction of 2-acetylpyridine and 1,2-diaminoethane, was also characterized by single crystal X-ray structure analysis. The crystal packing is stabilized by intermolecular H-bonding and p-p interactions