Citation: MUHAMMAD Hafeez, MUHAMMAD Naeem Ahmed, SONJA Lippert, WINFRIED P. Krtetschmer. Syntheses, Characterization and Crystal Structures of Two Novel Oxazoline Based Titanium Complexes[J]. Chinese Journal of Structural Chemistry, ;2015, 34(7): 1121-1127. doi: 10.14102/j.cnki.0254-5861.2011-0623 shu

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

a.
a. Department of Chemistry, The University of Azad Jammu and Kashmir, Muzaffarabad 13100, Pakistan;
b.
b. Inorganic Chemistry Ⅱ, University of Bayreuth, 95440 Bayreuth, Germany

Received Date: 4 January 2015
Available Online: 28 April 2015
Fund Project: This work was supported by the Higher Education Commission (HEC) (HEC)

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, ¹³C 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)Å, Z=4 and V=2943.2(2)Å³. Compound 2 crystalizes in the monoclinic system, space group P2₁/c with a=15.6400(11), b=10.12.60(7), c=22.9120(14)Å, Z=4 and V=3558.5(4)Å³. The synthesized compounds were employed for ethylene polymerization catalysis. Both complexes showed moderate activity when activated with dry methylaluminoxane (dMAO) and complex 1 produced very high molecular weight polyethylene.
- octahedron,
- polymerization titanium,
- trichloride,
- X-ray
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