The dectection of disilicon carbide (Si2C or SiCSi) was
Astrophysical Journal Letters in 2015 by
Cernicharo et al. in
IRC+10216 by matching 112 rotational lines. The
telescope was used for the observations. An associated theoretical paper by
Reilly et al. was copublished in the
Journal of Chemical Physics
with the astronomical detection. No confirmation of the detection has been reported to date.
Diatomic SiC was discovered in 1989
and cyclic SiC2 has been known since 1984.
Two larger Si-C species are also known: linear SiC4 was detected in
rhomboidal SiC4 was detected in 2011. The
detection of Si2C thus fills in something of a gap.