National Institute of Standards and Technology
Computational Chemistry Comparison and Benchmark DataBase
Release 18October 2016
NIST Standard Reference Database 101
IIntroduction
IIExperimental data
IIICalculated data
IVData comparisons
VCost comparisons
VIInput and output files
VIITutorials and Units
VIIILinks to other sites
IXFeedback
XOlder CCCBDB versions
XIIGeometries
XIII Vibrations
XIVReaction data
XVEntropy data
XVIBibliographic data
XVIIIon data
XVIIIBad calculations
XIXIndex of properties
XXH-bond dimers
XXIOddities

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III.F.2.

Completed calculations for C3O2+ (Carbon suboxide cation)

Methods and basis sets for which an energy has been calculated. "e" indicates just an energy has been calculated. "o" indicates an optimized geometry. "v" indicates vibrational frequencies. "s" followed by a number indicates completed calculations for different states (for example s1ov). "c" followed by a number indicates completed calculations for different conformations (for example c2ov).
See the Calculated Energies page (section III.A.1) for more calculated properties.
Methods with predefined basis sets
composite G1 c1e
G2MP2 c1e
G4 c1e

Methods with standard basis sets
3-21G 3-21G* 6-31G* 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) TZVP cc-pVDZ cc-pVTZ aug-cc-pVTZ
hartree fock HF     c1ov         c1o c2ov      
density functional SVWN c1ov   c1ov c1ov       c1ov c2ov      
BLYP     c1ov                
B3LYP               c1ov c2ov      
B3LYPultrafine                     c1o
M06-2X   c1ov c1ov                
PBE1PBE     c1ov                
HSEh1PBE c1ov   c1ov c1ov           c1o  
TPSSh     c1ov c1ov     c1ov     c1o  
wB97X-D   c1ov c1ov c1ov   c1o   c1o c1ov c1o c1o
B97D3 c1ov   c1ov c1o   c1ov         c1o
3-21G 3-21G* 6-31G* 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) TZVP cc-pVDZ cc-pVTZ aug-cc-pVTZ
Moller Plesset perturbation MP2     c1o   c1o     c1o c2ov      
MP2=FULL                     c1o
MP3       c1o              
MP3=FULL     c1o c1ov              
B2PLYP     c1ov             c1o  
3-21G 3-21G* 6-31G* 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) TZVP cc-pVDZ cc-pVTZ aug-cc-pVTZ

Single point energy calculations (select basis sets)
aug-cc-pVTZ
Moller Plesset perturbation MP2FC// MP2FC/6-31G* c1e
Coupled Cluster CCSD// MP2FC/6-31G* c1e
CCSD(T)// MP2FC/6-31G* c1e
For descriptions of the methods (AM1, HF, MP2, ...) and basis sets (3-21G, 3-21G*, 6-31G, ...) see the glossary in section I.C. Predefined means the basis set used is determined by the method.