Phenylene

Not to be confused with phenalene.
The chemical structure of the para-phenylene group.

The phenylene group (C6H4) is based on a di-substituted benzene ring (arylene). For example, poly(p-phenylene) is a polymer built up from para-phenylene repeating units.[1]

References

  1. ↑ p. C-9, Section 11.6, Handbook of Chemistry and Physics, 62nd Edition, 1981-1982, CRC Press