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]

Abstract

The reaction of MCl4 (M = Zr or Ti) with β-aminoketones HL (R1HNCR2=CHCR3=O; R2 = R3 = Me; R2 = Me, R3 = CF3) yielded the bis(ligand) adducts MCl4·2HL (M = Zr, R1 = Pri or Ph; R2 = R3 = Me; or R1 = Pri, R2 = Me, R3 = CF3; M = Ti, R1 = Pri or CH2CH=CH2, R2 = R3 = Me). Reaction of MCl4 with the alkali-metal salts of the β-aminoketone ligands yielded the bis(ligand) complexes [M(R1NCMe=CHCMe=O)2Cl2] (M = Zr, R1 = Ph, p-ClC6H4, p-MeOC6H4 or Pri; M = Ti, R1 = Ph or p-MeOC6H4). Crystal structure determinations of the isostructural compounds ZrCl4·2PriHNCMe=CHCMe=O and TiCl4·2PriHNCMe=CHCMe=O indicated an octahedral co-ordination environment around the metal with the trans monodentate N-O ligands b..