Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 134, Issue 43, Pages 17858-17861Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja307699u
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Funding
- Harvard University
- NSF [CHE-0955885, NSF/CHE-0822838]
- William Lipscomb Memorial Fund
- G.T.S. the NSF
- George W. Merck Fellowship
- DOE [DE-AC02-06CH11357]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [0822838] Funding Source: National Science Foundation
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [0955885] Funding Source: National Science Foundation
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The reaction of (L-Ar)Co(py) with (BuN3)-Bu-t afforded the isolable three-coordinate Co-imido complex (L-Ar)Co((NBu)-Bu-t), which is paramagnetic at room temperature. Variable-temperature (VT) H-1 NMR spectroscopy, VT crystallography, and magnetic susceptibility measurements revealed that (L-Ar)Co((NBu)-Bu-t) undergoes a thermally induced spin crossover from an S = 0 ground state to a quintet (S = 2) state. The reaction of (L-Ar)Co(py) with mesityl azide yielded an isolable S = 1 terminal imido complex that was converted into the metallacycloindoline (L-Ar)Co(kappa(2)-NHC6H2-2,4-Me-2-6-CH2) via benzylic C-H activation.
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