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η^2 bonded Nickel(0) thiophene π-complexes - identifying the missing link in catalyst transfer polymerization

preprint
revised on 03.05.2018 and posted on 03.05.2018 by Weiying He, Brian O. Patrick, Pierre Kennepohl

We have structurally characterized a nickel(0) thiophene complex that represents a close analog to the proposed intermediates in the mechanism of catalyst transfer polycondensation (CTP) of thiophenes. Additional studies on this intermediate allow us to determine the bonding in such complexes using a combination of nuclear magnetic resonance spectroscopy, X-ray absorption spectroscopy, and DFT-based computations. Our structure of the catalyst agrees with previous postulates but provides important new structural insights into the species. Furthermore, our studies explain why these complexes actually exist and are stable enough to support living CTP.

Funding

Natural Sciences and Engineering Research Council of Canada

History

Email Address of Submitting Author

pierre@chem.ubc.ca

Email Address(es) for Other Author(s)

heweiying@chem.ubc.ca bpatrick@chem.ubc.ca

Institution

The University of British Columbia

Country

Canada

ORCID For Submitting Author

0000-0003-3408-9157

Declaration of Conflict of Interest

no conflict of interest

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