Molecules in Space (as of 10/2002)

2-7 atoms   8-13 atoms

Note: Deuterium isotopomers are given seperately only if their method of detection is intrinsically different from that of pure hydrogen isotopomers.

All molecules have been detected (also) by rotational spectroscopy in the radiofrequency to far-infrared regions unless indicated otherwise.
* indicates molecules that can be detected by their rotation-vibration spectrum,
** those detected by electronic spectroscopy only.
Transition metal molecules detected in atmospheres of stars by electronic spectroscopy are currently not included. Tentative detections are indicated by “?”. These include molecules for which (partial) overlap of lines cannot be ruled at the moment.

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2 atoms 3 atoms 4 atoms 5 atoms 6 atoms 7 atoms
H2 C3* c-C3H C5* C5H C6H
AlF C2H l-C3H C4H l-H2C4CH2CHCN
AlCl C2O C3N C4Si C2H4* CH3C2H
C2** C2S C3O l-C3H2CH3CN HC5N
CH CH2 C3S c-C3H2CH3NC HCOCH3
CH<sup>+</sup> HCN C2H2* CH2CN CH3OH NH2CH3
CN HCO CH2D+? CH4* CH3SH c-C2H4O
CO HCO+ HCCN HC3N HC3NH+H<sub>2</sub>CCHOH
CO+ HCS+ HCNH+ HC2NC HC2CHO
CP HOC+ HNCO HCOOH NH2CHO
CSi H2O HNCS H2CHN C5N
HCl H2S HOCO+ H2C2O l-HC4H*
KCl HNC H2CO H2NCN
NH** HNO H2CN HNC3
NO MgCN H2CS SiH4*
NS MgNC H3O+ H2COH+
NaCl N2H+ NH3
OH N2O c-SiC3
PN NaCN CH3*
SO OCS
SO+ SO2
SiN c-SiC2
SiO CO2*
SiS NH2
CS H3+
HF H2D+
SH* SiCN
HD AlNC
FeO
O<sub>2</sub>?
8 atoms 9 atoms 10 atoms 11 atoms 12 atoms 13 atoms
CH3C3N CH3C4H CH3C5N ? HC9N C6H6* HC11N
HCOOCH3 CH3CH2CN (CH3)2CO
CH<sub>3</sub>COOH (CH3)2O (CH2OH)2?
C7H CH3CH2OH
H2C6 HC7N
CH2OHCHO? C8H
l-HC6H*

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