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Imine-Based Vanadium Catalysts for α-Olefin Polymerization

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Olefin Upgrading Catalysis by Nitrogen-based Metal Complexes I

Part of the book series: Catalysis by Metal Complexes ((CMCO,volume 34))

Abstract

Advances over the last decade in the development of vanadium-based pro-catalysts bearing ligands containing the imine functionality are discussed in terms of their synthesis, characterization and their ability to oligmerize/polymerize α-olefins. The chapter is organized by ligand type, considering initially ligands which chelate (bi- and tri-dentate) only through nitrogen centres, before discussing those binding via nitrogen and oxygen (bi-, tri- and tetra-dentate), those with nitrogen, oxygen and sulfur donors (penta- and hexa-dentate) and finally a number of ligand systems which are either mono-dentate or for which the term imine can be more loosely applied, such as the heterocycle pyridine.

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Abbreviations

Ar:

Aryl

iBu:

Isobutyl

tBu:

tert-butyl

DMAC:

Dimethylaluminum chloride

DSC:

Differential scanning calorimetry

EPR:

Electron paramagnetic resonance

Et:

Ethyl

ETA:

Ethyltrichloroacetate

FTIR:

Fourier transform infrared

g/mmol h bar:

Grams per millimole (of pro-catalyst) per hour per bar

iPr:

Isopropyl

MAO:

Methylaluminoxane

Me:

Methyl

MLCT:

Metal to ligand charge transfer

MMAO:

Modified or methylisobutylaluminoxane

M n :

Number average molecular weight

M w :

Weight average molecular weight

Nacnac:

2,4-pentanediimine anion

NBE:

Norbornene

NMR:

Nuclear magnetic resonance

nPr:

n-propyl

PDI:

Polydispersity index

Ph:

Phenyl

Py:

Pyridine

THF:

Tetrahydrofuran

TIBA:

Triisobutylaluminum

TMEDA:

Tetramethylethylenediamine

TOF:

Turn over frequency

Tp/ :

Tris(3,5-dimethylpyrazolyl)methane

Tp*:

Tris(3,5-dimethylpyrazolyl)borato

TTPB:

Trityl tetrakis(pentafluorophenyl)borate

UV–Vis:

Ultraviolet-visible

XRF:

X-ray fluorescence

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Acknowledgments

Dr Simon Lancaster (UEA) is thanked for useful discussions.

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Authors and Affiliations

  1. School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, UK

    Carl Redshaw

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  1. Carl Redshaw
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Editors and Affiliations

  1. CSIC-Universidad de Sevilla, Instituto de Investigaciones Químicas, C/ Americo Vespucio, 49, Sevilla, 41092, Spain

    Juan Campora

  2. Institute of Chemistry of OrganoMetallic, National Council of Research - CNR, Via Madonna del Piano 10, Florence, 50019, Italy

    Giuliano Giambastiani

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Redshaw, C. (2011). Imine-Based Vanadium Catalysts for α-Olefin Polymerization. In: Campora, J., Giambastiani, G. (eds) Olefin Upgrading Catalysis by Nitrogen-based Metal Complexes I. Catalysis by Metal Complexes, vol 34. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-3815-9_4

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