An unsuccessful search for ortho-benzyne (o-C6H4) toward the
star V4334 Sgr (also known as
Sakurai's Object) was reported by
Woodward et al. in 2020.
They searched for a characteristic vibrational feature at 16.18 μm with the
EXES instrument on the
SOFIA airborne observatory but found no evidence for its presence.
This followed another unsuccessful search for benzyne reported by
Widicus Weaver et al. in 2007.
The earlier effort focused on detecting rotational transitions toward
CRL 618 with the
100m Green Bank radiotelescope.
The only single ring aromatic hydrocarbons that have been detected to date are
cyclopropenylidene, which is only