Russian Journal of Organic Chemistry,
37, 243-245 (2001)
An incredible source for assignment
errors is provided by enone-fragments. A rough estimation based on our
experience from our work of extracting CNMR-data from the public domain
chemical literature shows that about 5% of all enone-systems are
misassigned.
Compound IX
from the above mentioned literature citation is given with the
following assignment for the double-bond system:
The display within CSEARCH immediately
shows an assignment problem for both signals associated with the double
bond. The investment of 5 MILLISECONDS of CPU-usage detects this error.
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written by: Wolfgang.Robien(-at-)c13nmr.at
Page written on: March 8th, 2008
Page online since: March 8th,
2008
