A new interstellar polyatomic molecule:  detection of propynal in the cold cloud TMC-1.
We report the detection of the acetylene derivative propynal (HC triple bond CCHO) in the cold cloud TMC-1, with an abundance that is very close to that for the related species tricarbon monoxide (C3O).  Propadienone, an isomer of propynal with the formula H2C=C=C=O, was not detected and is hence less abundant than either C3O or HC2CHO.
Irvine
W M
WM
Five College Radio Astronomy Observatory, University of Massachusetts, USA.
Brown
R D
RD
Cragg
D M
DM
Friberg
P
P
Godfrey
P D
PD
Kaifu
N
N
Matthews
H E
HE
Ohishi
M
M
Suzuki
H
H
Takeo
H
H
D000447:Aldehydes / Q000737:chemistry*; D055580:Astronomical Phenomena; D001256:Astronomy; D002244:Carbon / Q000032:analysis / Q000737:chemistry*; D002248:Carbon Monoxide; D055598:Chemical Phenomena; D002621:Chemistry; D005118:Extraterrestrial Environment; D007536:Isomerism; D008956:Models, Chemical
D000447:Aldehydes; C018132:propiolaldehyde; D002244:Carbon; D002248:Carbon Monoxide