benzyne

noun
ben·zyne | \ ˈben-ˌzīn \
plural -s

Definition of benzyne 

: an unsaturated cyclic hydrocarbon C6H4 derived from and structurally similar to benzene but having one of the double bonds of benzene replaced by a triple bond

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First Known Use of benzyne

1936, in the meaning defined above

History and Etymology for benzyne

benzene + -yne

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The first known use of benzyne was in 1936

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