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 Cl⁺ (Chlorine atom 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.

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Methods with predefined basis sets

semi-empirical	AM1	s1o s2o
	PM3	s1o s2o
composite	G1	s1e s2e
	G2MP2	s1e s2e
	G2	s1e s2e
	G3	s1e s2e
	G3B3	s1e s2e
	G4	s1e s2e
	CBS-Q	s1e s2e

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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)	6-311+G(3df,2pd)	TZVP	cc-pVDZ	cc-pVTZ	cc-pVQZ	aug-cc-pVDZ	aug-cc-pVTZ	aug-cc-pVQZ	daug-cc-pVTZ
hartree fock	HF	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o
	ROHF	s1o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o
density functional	LSDA	s1o s2o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o s2o	s1o s2o	s1o
	BLYP	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o s2o	s1o s2o	s1o
	B1B95	s1o s2o		s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o s2o	s1o s2o	s1o
	B3LYP	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o
	B3LYPultrafine	s1o	s1o s2o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o s2o	s1o s2o	s1o
	B3PW91	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o s2o	s1o s2o	s1o
	mPW1PW91	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o s2o	s1o s2o	s1o
	M06-2X	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o s2o	s1o s2o	s1o
	PBEPBE	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o s2o	s1o s2o	s1o
	PBEPBEultrafine	s1o	s1o s2o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o s2o	s1o s2o	s1o
	PBE1PBE	s1o s2o		s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o s2o	s1o s2o	s1o
	HSEh1PBE	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o s2o	s1o s2o	s1o
	TPSSh	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o			s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o
	wB97X-D	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o			s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o
	B97D3	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o		s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o
		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)	6-311+G(3df,2pd)	TZVP	cc-pVDZ	cc-pVTZ	cc-pVQZ	aug-cc-pVDZ	aug-cc-pVTZ	aug-cc-pVQZ	daug-cc-pVTZ
Moller Plesset perturbation	MP2	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o
	MP2=FULL	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o
	ROMP2	s2o		s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o			s1o s2o	s1o s2o	s1o s2o		s1o s2o
	MP3	s1o	s1o	s1o	s1o	s1o s2o	s1o	s1o s2o	s1o	s1o	s1o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o	s1o
	MP3=FULL		s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o			s1o s2o	s1o s2o	s1o s2o		s1o s2o	s1o s2o
	MP4	s1o	s1o s2o	s1o	s1o	s1o s2o	s1o	s1o	s1o	s1o s2o	s1o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o s2o	s1o s2o	s1o
	MP4=FULL	s1o	s1o s2o	s1o	s1o	s1o s2o	s1o	s1o	s1o	s1o s2o	s1o	s1o	s1o	s1o	s1o s2o	s1o s2o	s1o	s1o s2o	s1o s2o	s1o
	B2PLYP	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o			s1o s2o	s1o s2o	s1o s2o		s1o s2o	s1o s2o
	B2PLYP=FULL	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o			s1o s2o	s1o s2o	s1o s2o		s1o s2o	s1o s2o
	B2PLYP=FULLultrafine	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o			s1o s2o	s1o s2o	s1o s2o		s1o s2o	s1o s2o
Configuration interaction	CID	s1o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o s2o	s1o	s1o	s1o	s1o	s1o	s1o	s1o	s1o	s1o	s1o	s1o
	CISD	s1o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o s2o	s1o	s1o	s1o	s1o	s1o	s1o	s1o	s1o	s1o	s1o	s1o
		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)	6-311+G(3df,2pd)	TZVP	cc-pVDZ	cc-pVTZ	cc-pVQZ	aug-cc-pVDZ	aug-cc-pVTZ	aug-cc-pVQZ	daug-cc-pVTZ
Quadratic configuration interaction	QCISD	s1o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o s2o	s1o s2o	s1o
	QCISD(T)	s1o	s1o	s1o	s1o	s1o s2o	s1o	s1o	s1o s2o	s1o	s1o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o s2o	s1o s2o	s1o
	QCISD(T)=FULL					s1o s2o		s1o s2o							s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o
	QCISD(TQ)	s1o	s1o	s1o	s1o	s1o s2o	s1o	s1o s2o	s1o	s1o	s1o	s1o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o
	QCISD(TQ)=FULL					s1o s2o		s1o s2o							s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o
Coupled Cluster	CCD	s1o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o s2o	s1o s2o	s1o
	CCSD		s1o	s1o	s1o	s1o s2o	s1o	s1o	s1o	s1o	s1o s2o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o
	CCSD=FULL	s1o	s1o	s1o	s1o	s1o s2o	s1o	s1o	s1o	s1o	s1o s2o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o
	CCSD(T)		s1o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o
	CCSD(T)=FULL	s1o	s1o	s1o	s1o	s1o s2o	s1o	s1o	s1o	s1o	s1o	s1o	s1o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o
		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)	6-311+G(3df,2pd)	TZVP	cc-pVDZ	cc-pVTZ	cc-pVQZ	aug-cc-pVDZ	aug-cc-pVTZ	aug-cc-pVQZ	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	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o			s1o s2o
	ROHF	s1o	s1o	s1o	s1o	s1o	s1o
density functional	LSDA	s1o	s1o	s1o	s1o	s1o	s1o
	BLYP	s1o	s1o	s1o	s1o	s1o	s1o
	B1B95	s1o	s1o	s1o	s1o	s1o	s1o
	B3LYP	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o			s1o s2o
	B3LYPultrafine	s1o	s1o	s1o	s1o	s1o	s1o
	B3PW91	s1o	s1o	s1o	s1o	s1o	s1o
	mPW1PW91	s1o	s1o	s1o	s1o	s1o	s1o
	M06-2X	s1o	s1o	s1o	s1o	s1o	s1o
	PBEPBE	s1o	s1o	s1o	s1o	s1o	s1o			s1o s2o
	PBEPBEultrafine	s1o	s1o	s1o	s1o	s1o	s1o
	PBE1PBE	s1o	s1o	s1o	s1o	s1o	s1o
	HSEh1PBE	s1o	s1o	s1o	s1o	s1o	s1o
	wB97X-D	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o
Moller Plesset perturbation	MP2	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o	s1o s2o			s1o s2o
	MP2=FULL	s1o	s1o	s1o	s1o	s1o	s1o
	MP3	s1o	s1o	s1o	s1o	s1o	s1o
	MP4	s1o	s1o	s1o	s1o	s1o	s1o
	MP4=FULL	s1o	s1o	s1o	s1o	s1o	s1o
Configuration interaction	CID	s1o	s1o	s1o	s1o	s1o	s1o
	CISD	s1o	s1o	s1o	s1o	s1o	s1o
Quadratic configuration interaction	QCISD	s1o	s1o	s1o	s1o	s1o	s1o
	QCISD(T)	s1o	s1o	s1o	s1o	s1o	s1o
	QCISD(TQ)	s1o	s1o	s1o	s1o	s1o	s1o
Coupled Cluster	CCD	s1o	s1o	s1o	s1o	s1o	s1o
	CCSD	s1o	s1o	s1o	s1o	s1o	s1o
	CCSD=FULL	s1o	s1o	s1o	s1o	s1o	s1o
	CCSD(T)	s1o	s1o	s1o	s1o	s1o	s1o
	CCSD(T)=FULL	s1o	s1o	s1o	s1o	s1o	s1o

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Single point energy calculations (select basis sets)

		cc-pVDZ	cc-pVTZ	aug-cc-pVDZ	aug-cc-pVTZ
Moller Plesset perturbation	MP2FC// HF/6-31G*	s1e	s1e	s1e	s1e
	MP2FC// MP2FC/6-31G*				s1e
Coupled Cluster	CCSD(T)// HF/6-31G*	s1e	s1e	s1e	s1e
	CCSD(T)// B3LYP/6-31G*		s1e
	CCSD// MP2FC/6-31G*				s1e
	CCSD(T)// MP2FC/6-31G*				s1e

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.