National Institute of Standards and Technology

Computational Chemistry Comparison and Benchmark DataBase
Release 22	May 2022
NIST Standard Reference Database 101

I	Introduction
II	Experimental data
III	Calculated data
IV	Data comparisons
V	Cost comparisons
VI	Input and output files
VII	Tutorials and Units
VIII	Links to other sites
IX	Feedback
X	Older CCCBDB versions
XII	Geometries
XIII	Vibrations
XIV	Reaction data
XV	Entropy data
XVI	Bibliographic data
XVII	Ion data
XVIII	Bad calculations
XIX	Index of properties
XX	H-bond dimers
XXI	Oddities

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III.F.2.

Completed calculations for C₃H₃ (cyclopropenyl radical)

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.

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Methods with predefined basis sets

semi-empirical	PM3	c2o
composite	G1	c2e
	G2MP2	c2e
	G2	c2e
	G3	c2e
	G3B3	c2e
	G4	c2e
	CBS-Q	c2e

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Methods with standard basis sets

		STO-3G	3-21G	3-21G*	6-31G	6-31G*	6-31G**	6-31+G**	6-311G*	6-311G**	6-31G(2df,p)	6-311+G(3df,2p)	TZVP	cc-pVDZ	cc-pVTZ	aug-cc-pVDZ	aug-cc-pVTZ	daug-cc-pVTZ
hartree fock	HF	c2ov	c2o	c2o	c2o	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov		c2ov	c2ov	c2ov	c2ov	c2ov	c1o
	ROHF		c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov			c2ov	c2ov	c2ov	c2ov	c2ov
density functional	LSDA	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov		c2ov	c2ov	c2ov	c2ov	c2ov
	BLYP	c2ov	c2ov	c2ov	c2ov	c1o c2ov	c2ov	c2ov	c2ov	c2ov	c2ov		c2ov	c2ov	c2ov		c2ov
	B1B95	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov		c2ov	c2ov	c2ov	c2ov	c2ov
	B3LYP	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov		c2ov	c2ov	c2ov	c2ov	c2ov
	B3LYPultrafine		c2ov			c2ov	c2ov	c2ov	c2ov				c2ov	c2ov	c2ov	c2ov	c2ov
	B3PW91	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov		c2ov	c2ov	c2ov
	mPW1PW91	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov		c2ov	c2ov	c2ov	c2ov	c2ov
	M06-2X	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c1o c2ov	c2ov	c2ov	c2ov	c2ov	c2ov
	PBEPBE	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov		c2ov	c2ov	c2ov	c2ov	c2ov
	PBEPBEultrafine		c2ov			c2ov	c2ov	c2ov	c2ov				c2ov	c2ov	c2ov	c2ov	c2ov
	PBE1PBE	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov		c2ov	c2ov	c2ov	c2ov	c2ov
	HSEh1PBE	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov		c2ov	c2ov	c2ov	c2ov	c2ov
	TPSSh		c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov				c2ov	c2ov	c2ov	c2ov	c2ov
	B97D3											c1o						c1o c2ov
		STO-3G	3-21G	3-21G*	6-31G	6-31G*	6-31G**	6-31+G**	6-311G*	6-311G**	6-31G(2df,p)	6-311+G(3df,2p)	TZVP	cc-pVDZ	cc-pVTZ	aug-cc-pVDZ	aug-cc-pVTZ	daug-cc-pVTZ
Moller Plesset perturbation	MP2	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov		c2ov	c2ov	c2ov	c2ov	c2ov
	MP2=FULL	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov		c2ov	c2ov	c2ov	c2ov	c2ov
	ROMP2	c2o	c2ov	c2o	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov		c2ov	c2ov	c2ov	c2ov
	MP3					c2ov		c2ov					c2ov	c2ov	c2ov
	MP3=FULL					c2ov		c2ov					c2ov	c2ov	c2ov
	MP4		c2o			c2ov				c2ov			c2ov	c2o	c2ov	c2ov	c2o
	MP4=FULL		c2o			c2ov				c2ov				c2o	c2ov	c2ov	c2o
	B2PLYP	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov		c2ov	c2ov	c2ov	c2ov	c2ov
	B2PLYP=FULL	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov		c2ov	c2ov	c2ov	c2ov	c2ov
	B2PLYP=FULLultrafine					c1o c2ov								c1o c2ov	c1o c2ov		c1o c2ov
Configuration interaction	CID		c2o	c2o	c2ov	c2ov			c2ov
	CISD		c2o	c2o	c2ov	c2ov			c2ov
		STO-3G	3-21G	3-21G*	6-31G	6-31G*	6-31G**	6-31+G**	6-311G*	6-311G**	6-31G(2df,p)	6-311+G(3df,2p)	TZVP	cc-pVDZ	cc-pVTZ	aug-cc-pVDZ	aug-cc-pVTZ	daug-cc-pVTZ
Quadratic configuration interaction	QCISD		c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov		c2ov	c2ov	c2ov	c2ov	c2ov
	QCISD(T)					c2ov							c2ov	c2ov	c2ov	c2ov	c2ov
	QCISD(T)=FULL					c2ov		c2ov						c2o	c2ov	c2ov	c2o
	QCISD(TQ)					c2ov		c2o						c2o	c2o	c2ov	c2o
	QCISD(TQ)=FULL					c2ov		c2o						c2o	c2o	c2o	c2o
Coupled Cluster	CCD		c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov		c2ov	c2ov	c2ov	c2ov	c2ov
	CCSD					c2ov					c2ov		c2ov	c2ov	c2ov	c2ov	c2ov
	CCSD=FULL					c2ov					c2ov		c2ov	c2ov	c2ov	c2ov	c2ov
	CCSD(T)					c2ov							c2ov	c2o	c2ov	c2ov	c2ov
	CCSD(T)=FULL					c2ov							c2ov	c2ov	c2ov	c2ov	c2ov
		STO-3G	3-21G	3-21G*	6-31G	6-31G*	6-31G**	6-31+G**	6-311G*	6-311G**	6-31G(2df,p)	6-311+G(3df,2p)	TZVP	cc-pVDZ	cc-pVTZ	aug-cc-pVDZ	aug-cc-pVTZ	daug-cc-pVTZ

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Methods with effective core potentials (select basis sets)

		CEP-31G	CEP-31G*	CEP-121G	CEP-121G*	LANL2DZ	SDD	cc-pVTZ-PP	aug-cc-pVTZ-PP	Def2TZVPP
hartree fock	HF	c2ov	c2o	c2ov	c2ov	c2ov	c2ov			c1o
density functional	B3LYP	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov			c1o
	PBEPBE									c1o
Moller Plesset perturbation	MP2	c2ov	c2ov	c2ov	c2ov	c2ov	c2ov			c1o

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.