What's new?
And what is not quite so new anymore?
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.
Recent Catalog Entries
- Nov. 2024: CH3C(O)NH2, vt = 0; CH3C(O)NH2, vt = 1; CH3C(O)NH2, vt = 2; CH3C(O)NH2, Δ(vt) > 0; NC334S; NC5S; NC7S; NC4S; NC6S.
- Oct. 2024: CH3CH=C=CHCN; C2H5C3N; H2C=C=CHNC; NCCS; NC3S.
- Sep. 2024: H2C(CCH)2; CH3N13C; 13CH3NC; CH315NC; vinoxy; HOCS+; CH317OH, vt = 0; CH317OH, vt = 1; CH317OH, vt = 0 ↔ 1.
- Aug. 2024: DC17O+; CH3OD, vt = 0; CH3OD, vt = 1; H2CCO v9 = 1; H2CCO v6 = 1; H2CCO v5 = 1.
- July 2024: HC18O+; HC17O+; DC18O+; corrected tags and minor mishaps for EtCP isotopologs.
- June 2024: C2H5CP; C2H513CP; CH313CH2CP; 13CH3CH2CP.
- May 2024: 3-hydroxypropenal; MgCCH; CaCCH; 25MgCCH; 26MgCCH; Mg13CCH; MgC13CH; cyanothioketene.
- Apr. 2024: HCCNC; DCCNC; HCCN13C; HC13CNC; H13CCNC; HCC15NC; DNC3; HNCC13C; HNC13CC; HN13CCC; cis-HSNO; trans-HSNO.
- Feb. 2024: HNSiO; HPCO; HSiCCH; H2C3Si; H2C4Si; HCNH+.
- Jan. 2024: HNSO; H2NC3N; E-2-butenenitrile; syn-3-butenenitrile; gauche-3-butenenitrile.
General Section and General Remarks
- Nov. 2023: The information on the meaning of lower case characters as quantum numbers was misleading and has been rephrased. The term gI 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.
Catalog Search Form
- Nov. 2021: A new group was defined: Other hydrocarbons, that are hydrocarbons different from the carbon chain species CnH and CnH2, but including isotopologs.
Partition Functions
- 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.
Molecules in Space
- Nov. 2024: added MgS, NaS, and 1-cyanopyrene with documentations.
- Oct. 2024: added 1- and 5-C12H7CN with documentation.
- Sep. 2024: added dicyanomethane and Z-1,2-dicyanoethene with documentations; updated HOCS+ documentation.
- Aug. 2024: added HC3S, NC3S, CH2(CCH)2, and HNC5 with documentations; updated PO, methanol, and 3-hydroxypropenal documentations.
- July 2024: added HC3N+ with documentation.
- June 2024: added 1-butyne, HC5N+, and HC7N+ with documentations.
- May 2024: added CaC2, H2CNCN, and cyanothioketene with documentations.
- Apr. 2024: added thioxyhydroxymethylium, thionylimide, and methoxyethanol with documentations; updated HCCNC, HNC3, and HNCS documentations.
- Mar. 2024: added extragalactic protonated acetylene with documentation; updated H2O documentation.
- Feb. 2024: added HCNS with documentation. Updated HNCS, HSCN, HNCO, and HCNO documentations.
- Jan. 2024: updated SiC2 documentation. The 2-butenenitrile species are counted as two because mutual conversion requires breaking of a (double) bond, hence, the E- and Z-species are different isomers, not conformers.
Fitting Spectra
- July 2024: added “Some considerations for using SPCAT”.
- May 2024: added 3-hydroxypropenal data.
Cologne Spectroscopy Data
Archive "Cologne Spectroscopy Data"
- July 2024: added CH3OD and CH317OH files.
- June 2024: added C2H5CP files.
- Jan. 2024: isobutene files are complete.