A tentative detection of methyl isocyanide (CH3NC) was reported by
Cernicharo et al. in 1988.
Three broadened rotational submilimeter transitions were found toward
Sgr B2(OH) with the
IRAM 30m telescope. The next evidence for the
presence of CH3NC in space was the reported detection of the J=1-0 transition at a centimeter
wavelength observed with the Green Bank Telescope by
Remijan et al. in 2005.
In 2013, Gratier et al. confirmed the
existence of interstellar methyl isocyanide with a detection toward the
again using the IRAM 30m telescope. The 5 associated lines of the K-ladder of the J=5-4 transition
Methyl isocyanide is the less stable
isomer of another detected astromolecule, methyl cyanide.
Other detected X–N≡C compounds include
hydrogen isocyanide (HNC),
magnesium isocyanide (MgNC),
aluminium isocyanide (AlNC),
silicon isocyanide (SiNC), and
hydromagnesium isocyanide (HMgNC).