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This is an old revision of the document!

The database is described in

H. S. P. Müller, F. Schlöder, J. Stutzki, and G. Winnewisser, J. Mol. Struct. 742, 215–227 (2005)

and in

H. S. P. Müller, S. Thorwirth, D. A. Roth, and G. Winnewisser, Astronomy and Astrophysics 370, L49–L52 (2001).

Please acknowledge use of the CDMS by citing these article. You are very welcome to state the web address also. We recommend to cite the original sources of the data too, which are given in the documentations, at least as far as this is feasible.

Earlier Catalog Entries

Jun. 2026: 1-Cyanocyclopentene; MgC₄H; MgC₃N; CaC₄H.
May 2026: OH⁺, v = 0; OH⁺, v = 1; OH⁺, v = 1 − 0; OH⁺, v = 2 − 0.
Apr. 2026: 2,5-c-C₆H₆S; 2,4-c-C₆H₆S; C₃H₃CHO; 2-azabutadiene; 1-azetine; cyclopropanone.
Mar. 2026: 1H-cyclopent[cd]indene; ¹³CH₂DCN; CH₂D¹³CN; CH₂DC¹⁵N; ¹³CH₃CN, v = 0; CH₃¹³CN, v = 0; ¹³CH₃CN, v₈ = 1; CH₃¹³CN, v₈ = 1; ¹³CH₃CN, v₈ = 2; CH₃¹³CN, v₈ = 2.
Feb. 2026: HeH⁺; mercaptoethanol.
Jan. 2026: 2-Aminopropenenitrile; trans-HNSO; ¹³CH₃C¹⁵N; CH₃¹³C¹⁵N; ¹³CH₃¹³CN; methylallene.

Nov. 2023: The information on the meaning of lower case characters as quantum numbers was misleading and has been rephrased. The term g_I was missing in several “useful equations” because it was assumed to be 1 initially.
Mar. 2019: The program of the VAMDC-CDMS was updated. The Classic or ascii-CDMS was moved to this server. Links have been corrected and should work, but a detailed check is pending. The coding of special characters has been adjusted.
Nov. 2009: added note in the link which explains the aggregate spin number.

Archive "Catalog Search Form"

Nov. 2021: A new group was defined: Other hydrocarbons, that are hydrocarbons different from the carbon chain species C_nH and C_nH₂, but including isotopologs.

Apr. 2010: started to add values at 2.725 and 5 K for some species. The log values are also displayed in the partition function table.

Archive "Molecules in Space"

Jun. 2026: added methyl carbamate; updated glycolamide documentation.
Apr. 2026: added 2,5-cyclohexadienthione with documentation, updated CH₃OH and CH₃CN documentations.
Mar. 2026: added 2-hydroxypropanal and methoxyethanal with documentations, updated methyl acetate, hydroxypropanone, and ethyl formate documentations.
Feb. 2026: added propadienone and 1H-cyclopent[cd]indene with documentations; updated NH₃, H₃O⁺, CH₃OH, cyclopropenone, and cyclopropenethione documentations.
Jan. 2026: added 3- and 4-cyanoacenaphthylene with documentations.