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@article{Tomov:2009:10.1021/om900792x,
author = {Tomov, AK and Gibson, VC and Britovsek, GJP and Long, RJ and van, Meurs M and Jones, DJ and Tellmann, KP and Chirinos, JJ},
doi = {10.1021/om900792x},
journal = {Organometallics},
pages = {7033--7040},
title = {Distinguishing Chain Growth Mechanisms in Metal-catalyzed Olefin Oligomerization and Polymerization Systems: C2H4/C2D4 Co-oligomerization/Polymerization Experiments Using Chromium, Iron, and Cobalt Catalysts},
url = {http://dx.doi.org/10.1021/om900792x},
volume = {28},
year = {2009}
}

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TY  - JOUR
AB  - A series of co-oligomerization and copolymerization reactions of C2H4/C2D4 (1:1) mixtures have been carried out using various transition metal catalysts based on Cr, Co, and Fe in combination with MAO. The oligomeric R-olefin products have been analyzed by GC and GC/MS, and the experi- mental results have been compared with the theoretical mass spectra derived from mathematical models. Solid polymer samples have been analyzed by 13C{1H} and 13C DEPT-135 NMR spectro- scopy. C2H4/C2D4 co-oligomerization can be used as a method to differentiate between a metalla- cyclic or a Cossee-type chain growth mechanism in oligomerization systems. In the case of a metallacyclic mechanism, no H/D scrambling is observed, whereas for a Cossee-type mechanism, similar rates of chain propagation and chain termination (à-H elimination) result in rapid H/D scrambling of the C2H4/C2D4 feed. This method is therefore limited to oligomerization systems and cannot be applied in polymerization systems, where the rate of chain propagation is much faster than the rate of chain termination.
AU  - Tomov,AK
AU  - Gibson,VC
AU  - Britovsek,GJP
AU  - Long,RJ
AU  - van,Meurs M
AU  - Jones,DJ
AU  - Tellmann,KP
AU  - Chirinos,JJ
DO  - 10.1021/om900792x
EP  - 7040
PY  - 2009///
SP  - 7033
TI  - Distinguishing Chain Growth Mechanisms in Metal-catalyzed Olefin Oligomerization and Polymerization Systems: C2H4/C2D4 Co-oligomerization/Polymerization Experiments Using Chromium, Iron, and Cobalt Catalysts
T2  - Organometallics
UR  - http://dx.doi.org/10.1021/om900792x
VL  - 28
ER  -

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