Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 138, Issue 6, Pages 1840-1843Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.5b13116
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Funding
- DFG [IRTG 2027, SFB 858]
- FCI
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For the efficient utilization of carbon dioxide as feedstock in chemical synthesis, low-energy barrier CO, activation is a valuable tool. We report a metal-free approach to reversible CO, binding under mild conditions based on simple Lewis base adducts with electron-rich phosphines. Variable-temperature NMR studies and DFT calculations reveal almost thermoneutral CO, binding with low-energy barriers or stable CO2 adduct formation depending on the phosphines donor ability. The most basic phosphine forms an air-stable CO2 adduct that was used as phosphine transfer agent, providing a convenient access to transition-metal complexes with highly electron-rich phosphine ligands relevant to catalysis.
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