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A short and easy method for the conversion of chair-like transition states into zig-zag projections using planar cyclohexane structures, and also the concepts of change of bond in the plane and group swap by rotation are described. Some common reactions where this method could be used to draw products include: aldol reaction, [3,3] sigmatropic rearrangements, allylation and crotylation of aldehydes,...
The interconversion between the perspective formulae and Newman projections is illustrated here. The method describes how students can look at their own hands as models for the visualization and interconversion. The procedure is also applicable for drawing Newman projections of chair conformations.
Visualization of molecules in three dimensions is an important aspect of organic chemistry. The use of hands has been shown to be effective in the three-dimensional visualization of molecules [1]. A method of looking at one’s own hands as a model that allows students to see the interconversion of Fischer and zig-zag projections is described in this article.
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