SYNTHESIS, STRUCTURAL INVESTIGATIONS AND ETHYLENE POLYMERIZATION OF TITANIUM COMPLEXES WITH TRIPODAL OXAZOLINE LIGANDS

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HAFEEZ MUHAMMAD; LIPPERT SONJA; BAUER TOBIAS; KRETSCHMER WINFRIED P.

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Journal: JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS) Year:2015 | Volume:12 | Issue:6 Page(s): 957-966

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Title

SYNTHESIS, STRUCTURAL INVESTIGATIONS AND ETHYLENE POLYMERIZATION OF TITANIUM COMPLEXES WITH TRIPODAL OXAZOLINE LIGANDS

Author(s)

HAFEEZ MUHAMMAD | LIPPERT SONJA | BAUER TOBIAS | KRETSCHMER WINFRIED P.

Keywords

AMIDO LIGANDS

AMIDINATES

AMINOPYRIDINATES

N-LIGANDS

OLEFIN POLYMERIZATION

OXAZOLINE

TITANIUM

Abstract

A series of tripodal nitrogen containing ligands including amidine and aminopyridines with extra OXAZOLINE functionality were synthesized. The corresponding TITANIUM complexes bearing such ligands were synthesized by diethylamine elimination route. Diethylamidotitanium trichloride [Et2NTiCl3] reacts with the functionalized anilines, 2-(4, 4-dimethyl-4, 5-dihydrooxazol-2-yl)-N-(2-fluorophenyl)-aniline (FOxH) and 2-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)-N-(2-methoxyphenyl)aniline (MeOOxH), the amidine(E)-N’-(2, 6-diisopropylphenyl)-N-(2-(4, 4-dimethyl-4, 5-dihydrooxazol-2-yl) phenyl) benzimidamide ( Am OxH), and the aminopyridines N-(2-(4, 4-dimethyl-4, 5-dihydro oxazol-2-yl)phenyl)-6-(piperidin-1-yl) pyridin-2-amine (ApOxH) and N-(2-(4, 4- dimethyl- 4, 5-dihydrooxazol-2-yl)phenyl)-6-(2,4,6-triisopropyl phenyl)pyridin-2-amine (Ap*OxH), under diethylamine elimination to form the corresponding TITANIUM trichlorides [FOxTiCl3], [MeOOxTiCl3], [AmOxTiCl3], [ApOxTiCl3] and [Ap*OxTiCl3] in excellent yields. These compounds were characterized by spectroscopic methods, and X-ray crystal structure analysis (selected complexes). Furthermore, their behavior in ethylene polymerization was explored. The complexes show moderate activity towards ethylene if activated with MAO. The observed PEs were analyzed by HT-GPC and were found to be of low molecular weight for the amidinate AmOxTiCl3 but of very high one (Mp up to 3.5 million g/mol) for the aminopyridinate Ap*OxTiCl3 TITANIUM complex.

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APA: Copy

HAFEEZ, MUHAMMAD, LIPPERT, SONJA, BAUER, TOBIAS, & KRETSCHMER, WINFRIED P.. (2015). SYNTHESIS, STRUCTURAL INVESTIGATIONS AND ETHYLENE POLYMERIZATION OF TITANIUM COMPLEXES WITH TRIPODAL OXAZOLINE LIGANDS. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS), 12(6), 957-966. SID. https://sid.ir/paper/283106/en

Vancouver: Copy

HAFEEZ MUHAMMAD, LIPPERT SONJA, BAUER TOBIAS, KRETSCHMER WINFRIED P.. SYNTHESIS, STRUCTURAL INVESTIGATIONS AND ETHYLENE POLYMERIZATION OF TITANIUM COMPLEXES WITH TRIPODAL OXAZOLINE LIGANDS. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS)[Internet]. 2015;12(6):957-966. Available from: https://sid.ir/paper/283106/en

IEEE: Copy

MUHAMMAD HAFEEZ, SONJA LIPPERT, TOBIAS BAUER, and WINFRIED P. KRETSCHMER, “SYNTHESIS, STRUCTURAL INVESTIGATIONS AND ETHYLENE POLYMERIZATION OF TITANIUM COMPLEXES WITH TRIPODAL OXAZOLINE LIGANDS,” JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS), vol. 12, no. 6, pp. 957–966, 2015, [Online]. Available: https://sid.ir/paper/283106/en

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