Synthesis and structure of group 4 symmetric amidinate complexes and their reactivity in the polymerization of α-olefins

Tatyana Elkin; Naveen V. Kulkarni; Boris Tumanskii; Mark Botoshansky; Linda J.W. Shimon; Moris S. Eisen

doi:https://doi.org/10.1021/om4006998

Synthesis and structure of group 4 symmetric amidinate complexes and their reactivity in the polymerization of α-olefins

Tatyana Elkin, Naveen V. Kulkarni, Boris Tumanskii, Mark Botoshansky, Linda J.W. Shimon, Moris S. Eisen

Technion - Israel Institute of Technology, Weizmann Institute of Science

Research output: Contribution to journal › Article › peer-review

Abstract

The steric properties of various nitrogen substituents on amidines were tuned in order to obtain group 4 mono- and bis(amidinate) dimethylamido or chloride complexes. The amidinate dimethylamido and chloride complexes were prepared, and their solid-state as well as their solution-state structures were studied. After the activation by MAO, these complexes were tested in the polymerization of propylene and ethylene. A noticeable influence of the amidine carbon and nitrogen substituents on the activity of the catalyst and properties of the obtained polymer was observed. Further, a plausible mechanism for the ethylene polymerization process is presented taking into account a combination of ESR-C₆₀ and MALDI-TOF experiments, shedding light on the nature of the catalytic species.

Original language	English
Pages (from-to)	6337-6352
Number of pages	16
Journal	Organometallics
Volume	32
Issue number	21
DOIs	https://doi.org/10.1021/om4006998
State	Published - 11 Nov 2013

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry

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title = "Synthesis and structure of group 4 symmetric amidinate complexes and their reactivity in the polymerization of α-olefins",

abstract = "The steric properties of various nitrogen substituents on amidines were tuned in order to obtain group 4 mono- and bis(amidinate) dimethylamido or chloride complexes. The amidinate dimethylamido and chloride complexes were prepared, and their solid-state as well as their solution-state structures were studied. After the activation by MAO, these complexes were tested in the polymerization of propylene and ethylene. A noticeable influence of the amidine carbon and nitrogen substituents on the activity of the catalyst and properties of the obtained polymer was observed. Further, a plausible mechanism for the ethylene polymerization process is presented taking into account a combination of ESR-C60 and MALDI-TOF experiments, shedding light on the nature of the catalytic species.",

author = "Tatyana Elkin and Kulkarni, {Naveen V.} and Boris Tumanskii and Mark Botoshansky and Shimon, {Linda J.W.} and {S. Eisen}, Moris",

note = "USA-Israel Binational Science Foundation [2008283]This research was supported by the USA-Israel Binational Science Foundation under Contract 2008283. B.T. is grateful for the support to the Center for Absorption in Science, Ministry of Immigrant Absorption, State of Israel.",

year = "2013",

month = nov,

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doi = "https://doi.org/10.1021/om4006998",

language = "الإنجليزيّة",

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journal = "Organometallics",

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publisher = "American Chemical Society",

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T1 - Synthesis and structure of group 4 symmetric amidinate complexes and their reactivity in the polymerization of α-olefins

AU - Elkin, Tatyana

AU - Kulkarni, Naveen V.

AU - Tumanskii, Boris

AU - Botoshansky, Mark

AU - Shimon, Linda J.W.

AU - S. Eisen, Moris

N1 - USA-Israel Binational Science Foundation [2008283]This research was supported by the USA-Israel Binational Science Foundation under Contract 2008283. B.T. is grateful for the support to the Center for Absorption in Science, Ministry of Immigrant Absorption, State of Israel.

PY - 2013/11/11

Y1 - 2013/11/11

N2 - The steric properties of various nitrogen substituents on amidines were tuned in order to obtain group 4 mono- and bis(amidinate) dimethylamido or chloride complexes. The amidinate dimethylamido and chloride complexes were prepared, and their solid-state as well as their solution-state structures were studied. After the activation by MAO, these complexes were tested in the polymerization of propylene and ethylene. A noticeable influence of the amidine carbon and nitrogen substituents on the activity of the catalyst and properties of the obtained polymer was observed. Further, a plausible mechanism for the ethylene polymerization process is presented taking into account a combination of ESR-C60 and MALDI-TOF experiments, shedding light on the nature of the catalytic species.

AB - The steric properties of various nitrogen substituents on amidines were tuned in order to obtain group 4 mono- and bis(amidinate) dimethylamido or chloride complexes. The amidinate dimethylamido and chloride complexes were prepared, and their solid-state as well as their solution-state structures were studied. After the activation by MAO, these complexes were tested in the polymerization of propylene and ethylene. A noticeable influence of the amidine carbon and nitrogen substituents on the activity of the catalyst and properties of the obtained polymer was observed. Further, a plausible mechanism for the ethylene polymerization process is presented taking into account a combination of ESR-C60 and MALDI-TOF experiments, shedding light on the nature of the catalytic species.

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U2 - https://doi.org/10.1021/om4006998

DO - https://doi.org/10.1021/om4006998

M3 - مقالة

SN - 0276-7333

VL - 32

SP - 6337

EP - 6352

JO - Organometallics

JF - Organometallics

IS - 21

ER -

Synthesis and structure of group 4 symmetric amidinate complexes and their reactivity in the polymerization of α-olefins

Abstract

All Science Journal Classification (ASJC) codes

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