Syntheses, Characterization and Crystal Structures of Two Novel Oxazoline Based Titanium Complexes

Two novel titanium compounds [(E)-N’-(2,6-diisopropylphenyl)-N-(2-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)phenyl)benzimidamido]titanium trichloride(1) and [N-(2-(4,4-dimethyl-4,5-dihydrooxaz-ol-2-yl)phenyl)-6-(2,4,6-triisopropyl-phenyl) pyridin-2-amido]titanium trichloride(2) were synthesized by reacting the corresponding ligand with diethylaminetitaniumtrichloride in equal molar ratios. The compounds were characterized with 1H, 13 C NMR, elemental analysis and single-crystal X-ray diffraction analysis. The geometry of both compounds is distorted octahedron. The three nitrogen and one chlorine atoms are in the equatorial plane. Compound 1 crystallizes in orthorhombic system, space group P212121 with a = 10.3520(4), b = 16.5750(7), c = 17.1530(7) , Z = 4 and V = 2943.2(2)3. Compound 2 crystalizes in the monoclinic system, space group P21/n with a = 15.6400(11), b = 10.12.60(7), c = 22.9120(14), Z = 4 and V = 3558.5(4)3. The synthesized compounds were employed for ethylene polymerization catalysis. Both complexes showed moderate activity when activated with dry methylaluminoxane(d MAO) and complex 1 produced very high molecular weight polyethylene.