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A 207 Pb NMR study of the adducts of triphenyllead chloride and diphenyllead dichloride
Author(s) -
Margolis Lara A.,
Schaeffer Charles D.,
Yoder Claude H.
Publication year - 2003
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.412
Subject(s) - chemistry , tributylphosphine , adduct , pyridine , denticity , nmr spectra database , chloride , medicinal chemistry , inorganic chemistry , organic chemistry , crystal structure , catalysis , spectral line , physics , astronomy
207 Pb NMR spectra were used to determine the structure of adducts of triphenyllead chloride and diphenyllead dichloride in CH 2 Cl 2 and CH 3 CN. The bases included several phosphorus donors, such as tributylphosphine, oxygen donors, such as tributylphosphine oxide, and nitrogen donors, such as pyridine. A number of bidentate bases were also studied. The 207 Pb spectra indicate that rapid exchange occurs in the adducts, even at temperatures of −90 °C. The magnitude of the shift relative to the lead acid indicates that all of the bases, including the bidentate bases, form five‐coordinate adducts with triphenyllead chloride. Diphenyllead dichloride forms six‐coordinate adducts, except for the adduct with tributylphosphine, which is five‐coordinate. This is the first report of a five‐coordinate adduct of diphenyllead dichloride. Copyright © 2003 John Wiley & Sons, Ltd.