Wednesday, April 27, 2016

One minus one does not always equal zero in chemistry

In 1848, Louis Pasteur showed that molecules that are mirror images of each other had exactly opposite rotations of light. When mixed in solution, they cancel the effects of the other, and no rotation of light is observed. Now, a research team has demonstrated that a mixture of mirror-image molecules crystallized in the solid state can be optically active.

from Geochemistry News -- ScienceDaily

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