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是1997年JOC上的文章： J. Org. Chem. 1997, 62, 7512-7515 NMR Chemical Shifts of Common
Laboratory Solvents as Trace Impurities
Hugo E. Gottlieb,* Vadim Kotlyar, and
Abraham Nudelman*
Department of Chemistry, Bar-Ilan University,
Ramat-Gan 52900, Israel
Received June 27, 1997
In the course of the routine use of NMR as an aid for
organic chemistry, a day-to-day problem is the identifica-
tion of signals deriving from common contaminants
(water, solvents, stabilizers, oils) in less-than-analyti-
cally-pure samples. This data may be available in the
literature, but the time involved in searching for it may
be considerable. Another issue is the concentration
dependence of chemical shifts (especially 1H); results
obtained two or three decades ago usually refer to much
more concentrated samples, and run at lower magnetic
fields, than today’s practice.
We therefore decided to collect 1H and 13C chemical
shifts of what are, in our experience, the most popular
“extra peaks” in a variety of commonly used NMR
solvents, in the hope that this will be of assistance to
the practicing chemist.
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发表于 2007-10-25 10:48:30
