CCCBDB Elelctron affinities page 2

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composite	G2	3.062
	G3	2.970
	G3B3	2.843
	G3MP2	3.031
	G4	2.853
	CBS-Q	2.935

		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	cc-pVQZ	aug-cc-pVDZ	aug-cc-pVTZ	aug-cc-pVQZ	daug-cc-pVTZ
hartree fock	HF	-3.642	0.455	0.455	0.534		0.679	1.510	1.136	1.140	0.735	1.530		1.027	1.299	1.415	1.546	1.522	1.515	1.520
density functional	LSDA	-1.130	2.491	2.491	2.629				3.198	3.213			3.551		3.398			3.687
	BLYP	-1.736
	B1B95	-1.628	1.868	1.868	1.978		2.007		2.389	2.463			2.801	2.343	2.618
	B3LYP	-1.563	1.951	1.951	2.083				2.599	2.612	2.208	3.096			2.812	2.943			3.092
	B3LYPultrafine		1.952										2.958		2.801			3.098
	B3PW91	-1.583	1.997	1.997	2.098		2.133	2.996	2.582	2.588	2.185		2.872	2.455	2.740		3.009	2.984
	mPW1PW91	-1.646	1.978	1.956	2.053	2.102	2.115	2.973	2.554	2.537	2.139		2.818	2.433	2.708		2.974	2.936
	M06-2X	-1.674	1.957	1.957	2.048		2.092	2.949	2.564	2.564	2.174		2.849	2.406	2.746		2.959	2.980
	PBEPBE	-1.671	1.871	1.871								2.972
	PBEPBEultrafine		1.873
	PBE1PBE	-1.712	1.929	1.929	2.031	2.053	2.053	2.944	2.507	2.511	2.115		2.805	2.387	2.671		2.961	2.929
	HSEh1PBE	-1.719		1.908	2.013	2.034	2.039		2.498	2.503	2.101		2.803	2.372			2.951	2.921
	TPSSh		1.945	1.945	2.017	1.977			2.476				2.775	2.299	2.639			2.895
	wB97X-D			2.036		2.158		3.072		2.636			2.939	3.072	2.787			3.049
	B97D3					2.296		3.250		2.822		3.296	2.900		2.748
		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	cc-pVQZ	aug-cc-pVDZ	aug-cc-pVTZ	aug-cc-pVQZ	daug-cc-pVTZ
Moller Plesset perturbation	MP2	-2.190	1.782	1.782	2.076	2.260	2.290	3.277	2.813	2.838	2.595			2.775	3.224	3.444	3.559	3.581	3.616
	MP2=FULL	-2.189	1.785	1.785	2.079	2.252	2.281	3.267	2.814	2.838	2.574		3.102	2.773	3.193	3.423	3.556	3.547	3.592
	MP3					2.064		2.092					2.863	2.578	3.002
	MP3=FULL		1.521	1.521	1.778	2.055	2.083	2.999	2.602	2.627	2.392		2.858	2.575	2.973		3.303	3.279
	MP4		1.651			2.203				2.784			3.050	2.710	3.165		3.487	3.510
	MP4=FULL		1.653			2.193				2.781				2.706	3.132		3.482	3.472
	B2PLYP	-2.049	1.685	1.685	1.856		1.960	2.957	2.466	2.480	2.107		2.807	2.344	2.730			3.047
	B2PLYP=FULL	-2.049	1.686	1.686	1.857	1.948	1.960	2.957	2.467	2.481	2.106		2.807	2.345	2.727			3.043
	B2PLYP=FULLultrafine	-2.048	1.686	1.686	1.857	1.948	1.960	2.955	2.468	2.482	2.107		2.807	2.347	2.728			3.044
Configuration interaction	CID		1.353	1.353	1.589	1.843			2.362
Configuration interaction	CISD		1.109	1.109	1.312	1.664			2.191
		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	cc-pVQZ	aug-cc-pVDZ	aug-cc-pVTZ	aug-cc-pVQZ	daug-cc-pVTZ
Quadratic configuration interaction	QCISD		0.980	0.980	1.180	1.588	1.614	2.554	2.147	2.177	1.932		2.432	2.073	2.549		2.781	2.853
	QCISD(T)					1.625			2.197				2.503	2.122	2.622		2.875
	QCISD(T)=FULL					1.620		2.630						2.122	2.614	2.818	2.881	2.941	2.967
	QCISD(TQ)					1.562										2.769		2.897
	QCISD(TQ)=FULL					1.562										2.763		2.881
Coupled Cluster	CCD		1.465	1.465	1.729	2.020	2.048	2.961	2.564	2.588	2.353			2.530	2.944		3.241	3.244
	CCSD					1.582					1.932		2.432	2.075	2.551	2.741	2.787	2.855	2.875
	CCSD=FULL					1.581					1.925		2.431	2.075	2.537	2.733	2.786	2.839
	CCSD(T)					1.634	1.662		2.208				2.515	2.126	2.642	2.850		2.985	3.000
	CCSD(T)=FULL					-32.284							2.515	2.131	2.634	2.841		2.969	2.990
		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	cc-pVQZ	aug-cc-pVDZ	aug-cc-pVTZ	aug-cc-pVQZ	daug-cc-pVTZ

		CEP-31G	CEP-31G*	CEP-121G	CEP-121G*	LANL2DZ	SDD	cc-pVTZ-PP	aug-cc-pVTZ-PP	Def2TZVPP
hartree fock	HF	1.092	1.261	1.156	1.318	1.046	1.051			1.420
density functional	B3LYP	2.777	2.903			2.639	2.643			2.949
Moller Plesset perturbation	MP2	2.852	3.043	2.905	3.014	2.708	2.722			3.370

	Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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Calculated Electron Affininty for C2H (Ethynyl radical)

Calculated Electron Affininty for C₂H (Ethynyl radical)