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J. Chem. Educ. 2000, 77, 203-205
It has come to my attention that there are two errors
in my article, "Computational Investigations for
Undergraduate Organic Chemistry: Modeling a TLC Exercise to
Investigate Molecular Structure and Intermolecular Forces". In
Figure 1, the Rf values reported are inexplicably inconsistent
with the theory of TLC (as pointed out elsewhere in the
article), i.e., more polar solutes are expected to be more
strongly adsorbed on silica, resist elution with the nonpolar
solvent used (hexane) and hence be characterized by a smaller,
rather than a larger, Rf value. Unfortunately, the student work
from which this figure was prepared is no longer available. In
addition, on page 205, the eighth sentence in the
section Materials should read (correction in bold italics);
"Students are reminded that the polar
substances are not expected to elute with the
nonpolar solvent, and that the solvent
mixture may be needed to differentiate between compounds
of similar polarity."
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