Robust Chromium Precursors for Catalysis: Isolation and Structure of a Single-Component Ethylene Tetramerization Precatalyst
Abstract
We have introduced a new class of stable organometallic Cr reagents (compounds 1–4) that are readily prepared, yet reactive enough to serve as precursors. They were used for ethylene tetramerization catalysis following stoichiometric activation by in situ protonation. This study highlights the importance of balancing stability with reactivity in generating an organometallic precursor that is useful in catalysis. Moreover, precursor 4 allowed for the isolation and crystallographic characterization of a room-temperature stable cationic species, (PNP)CrR_2+ (R = o-C_6H_4(CH_2)_2OMe, PNP = ^iPrN(PPh_2)_2). This complex (5) may be used as a single component precatalyst, without any alkylaluminum reagents. This result provides an unprecedented level of insight into the kind of structures that must be produced from more complicated activation processes.
Additional Information
© 2019 American Chemical Society. Received: February 5, 2019; Published: March 15, 2019. We are grateful to The Dow Chemical Company, Caltech, the WAVE program (D.P.), and Dow Next Generation Educator (instrumentation) for funding. We thank Dr. Sean Ewart for insightful discussions. The authors declare no competing financial interest.Attached Files
Accepted Version - nihms-1068602.pdf
Supplemental Material - ja9b01387_si_001.cif
Supplemental Material - ja9b01387_si_002.pdf
Files
Additional details
- PMCID
- PMC7025812
- Eprint ID
- 93855
- DOI
- 10.1021/jacs.9b01387
- Resolver ID
- CaltechAUTHORS:20190315-082340173
- Dow Chemical Company
- Caltech
- WAVE Program
- Dow Next Generation Educator Fund
- Created
-
2019-03-15Created from EPrint's datestamp field
- Updated
-
2022-02-15Created from EPrint's last_modified field