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- adjective organic chemistry Describing a
molecular rearrangementin which a covalent single bondis formed between the ends of a fully conjugatedsystem resulting in a cycliccompound with one fewer double bonds
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I began to look at all kinds of organic transformations, and so I was prepared when in the Spring of 1964 R.B. Woodward asked me some questions about what subsequently came to be called electrocyclic reactions.