Methanimine (CH2NH) was initially detected in Sgr B2 by
Godfrey et al. and reported in 1973.
As summarized by
it has been
found in other hot core sources,
and its 13C isotope has also been identified, by
Cummins et al.
Methanimine was recently detected in the
ultraluminous infrared galaxy (ULIRG)
Arp 200 by
Salter et al. with the
Arecibo radio telescope, a discovery that is particularly
this object is 250 million light years away. In addition to the vast distance, methanimine is of
interest because it is an
amino acid precursor.
Methanime (also known as methyleneimine) is isolectronic with
formaldehyde. Like O in the latter, the -NH
imine group forms a double bond with the triplet