Electron exchange between potassium bis(tert-butyl(8)annulene)ytterbate(II) and potassium bis(tert-butyl(8)annulene)ytterbate(III)

Journal Article · Wed Jul 19 04:00:00 EDT 1989 · Journal of the American Chemical Society; (USA)

DOI:https://doi.org/10.1021/ja00197a040· OSTI ID:6971564

Eisenberg, D C; Kinsley, S A; Streitwieser, A ^[1]

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1. Lawrence Berkeley Lab., CA (USA)

Exchange on the {sup 1}H NMR time scale has been observed between potassium bis((8)annulene)ytterbate(II) (1) and potassium bis((8)annulene)ytterbate(III) (2). The absence of exchange between potassium bis((8)annulene)calcate(II) and 2 demonstrates that the measured exchange is electron exchange rather than ligand exchange. Rates of exchange have been determined between the corresponding tert-butyl derivatives, potassium bis(tert-butyl(8)annulene)ytterbate(II) (3) and potassium bis(tert-butyl(8)annulene)ytterbate(III) (4), by NMR line broadening techniques; typical second-order rate constants are 5 {times} 10{sup 7} M{sup {minus}1} s{sup {minus}1} at 19.3{degree}C in tetrahydrofuran (THF) and 1 {times} 10{sup 7} M{sup {minus}1} s{sup {minus}1} in THF containing diglyme. From these results and the activation parameters a mechanism is proposed that involves change in coordination of solvating diglyme.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6971564
• Journal Information: Journal of the American Chemical Society; (USA), Journal Name: Journal of the American Chemical Society; (USA) Vol. 111:15; ISSN 0002-7863; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKALI METAL COMPOUNDS
COMPLEXES
DATA
DATA ANALYSIS
ELECTRON EXCHANGE
ELECTRON TRANSFER
EXPERIMENTAL DATA
INFORMATION
MAGNETIC RESONANCE
MEASURING INSTRUMENTS
MEASURING METHODS
NUCLEAR MAGNETIC RESONANCE
NUMERICAL DATA
POTASSIUM COMPOUNDS
RARE EARTH COMPLEXES
RESONANCE
YTTERBIUM COMPLEXES