The civil war in the former Yugoslavia, the largest conflict in Europe for half a century, is more than incidentally about objects from the past and proofs of past possession. Here is a report on some of the specifics and some of the generalities.

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The syntheses of two optically active Co-(salen)-1,3-butadien-2-yl complexes are reported. One of the dienyl complexes was characterized by X-ray crystallography. The dienyl complexes underwent Diels-Alder reactions with high enantioselectivity with dimethyl fumarate. A highlight of this chemistry is that Diels-Alder cycloadduct cobalt complexes were cleanly cleaved at the cobalt-carbon bond with concomitant optically active cobalt complex starting material and optically active cyclohexene cycloadduct recovery.

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