A cyclic aromatic hydrocarbon containing two benzene rings fused through a four-membered carbon ring.
From 'bi-' (two) and 'phenylene' (the divalent form of phenyl). A chemical structure named systematically in the 20th century as organic nomenclature standardized.
Biphenylene is a kind of chemical 'bridge' where two benzene rings are connected unusually tightly through a tiny four-membered ring, making it a fascinating molecule that chemists study to understand how strained structures behave.
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