Synthesis of new adducts and co-ordination complexes of zirconium and titanium containing β-aminoketone ligands. Crystal structures of isostructural adducts MCl4·2PriHNCMeCHCMeO (M = Ti or Zr) and the complex [Zr(PhNCMeCHCMeO)2Cl2]

Ring-opening polymerization of ε-caprolactone and cyclohexene oxide initiated by aluminum β-ketoamino complexes: steric and electronic effect of 3-position substituents of the ligands

“…Keywords:Gring-opening polymerization, ε-caprolactone, cyclohexene oxide, aluminum β-ketoamino complexesU Introdution Mono-anionic β-ketoamino ligand has emerged as one of the most versatile ligands in coordination chemistry for their strong metal-ligand bonds [1][2][3][4][5][6][7][8][9][10][11] and for their relatively facile tunablility to access derivatives containing a range of substituents around the ligands' skeleton. In the past, most work paid their attentions to the steric and electronic effects of substituents (R) on the nitrogen donor atom and side groups (R 1 and/or R 2 ) of these ligands backbone (see the Scheme I) of metal complexes on the catalyst behavior.…”

Fluoroaryl-substituted ketiminate complexes of aluminum

“…The solvent was removed in vacuo and the yellow residue was taken into the drybox. Following the addition of 3 ml of C 6 …”

“…As a consequence of the formation of a six-membered chelate ring, the ligation of a ketiminate causes the metal center to be surrounded by bulky substituents on only one side of the ring, thus leaving the other side relatively open. Moreover, ligands of the type O-N are particularly interesting because the oxygen atom provides a site for strong coordination whereas the nitrogen atom is typically less strongly bound, thus resulting in ligand hemilability and potentially interesting catalytic behavior [6]. In order to develop catalytic systems with enhanced activities at the metal centers, it has become increasingly desirable to introduce electron-withdrawing substituents into the coordination sphere [7].…”

Syntheses and Crystal Structures of Two Ferrocenyl Enamine Esters

“…Recently enaminones and related compounds have been used as ligands in coordination chemistry [1,2] and have been extensively used as versatile synthetic intermediates that combine the ambident nucleophilicity of enamines with the ambident electrophilicity of enones for the preparation of a variety of heterocyclic systems including some natural products and analogues [3,4].…”