National Institute of Standards and Technology
Computational Chemistry Comparison and Benchmark DataBase
Release 22May 2022
NIST Standard Reference Database 101
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XIXIndex of properties
XXH-bond dimers
XXIOddities

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III.D.11.

Calculated Proton Affinity

Name Species   Species Name
Sulfur Hydroxide SOH H2CS+ thioformaldehyde cation

Bonding changes

Bond type O-S lost 1
Bond type H-O lost 1
Bond type C=S gained 1
Bond type H-C gained 2
Proton Affinities (kJ/mol)
Proton Affinities in kJ/mol
Methods with predefined basis sets
composite G2 -96722
G3 -96734
G3B3 -96735
G4 -96755
CBS-Q -96733

Proton Affinities in kJ/mol
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 cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ daug-cc-pVTZ
hartree fock HF -94689 -95887 -95859 -96351 -96363 -96369 -96381 -96391 -96398 -96381   -96424 -96376 -96430 -96442 -96406 -96436 -96444 -96436
ROHF   -95906 -95871 -96371 -96374 -96380 -96387 -96402 -96409     -96436 -96386 -96439 -96450 -96415 -96444 -96452  
density functional BLYP -94988 -96230 -96201 -96720 -96731 -96736 -96760 -96773 -96780 -96754   -96804 -96750 -96804   -96791 -96814    
B1B95 -95011   -96184 -96687 -96706 -96706 -96728 -96740 -96748 -96727   -96772 -96724 -96776   -96757      
B3LYP -94994 -96218 -96189 -96702 -96716 -96721 -96741 -96754 -96761 -96738   -96785 -96734 -96787 -96800 -96771 -96795 -96803  
B3LYPultrafine   -96218     -96716 -96721 -96741 -96754       -96785 -96734 -96787   -96771 -96795    
B3PW91 -94978 -96191 -96163 -96665 -96682 -96688 -96704 -96717 -96724 -96704   -96748 -96701 -96752   -96732 -96758    
mPW1PW91 -94994 -96201 -96173 -96675 -96693 -96699 -96715 -96727 -96735 -96714   -96759 -96710 -96762   -96743 -96770    
M06-2X -95012 -96201 -96173 -96683 -96703 -96709 -96724 -96737 -96745 -96726 -96775 -96768 -96721 -96776   -96754 -96782    
PBEPBE -94933 -96159 -96131 -96642 -96659 -96664 -96684 -96696 -96704 -96681   -96728 -96676 -96730   -96713 -96739    
PBEPBEultrafine   -96159     -96659 -96664 -96684 -96696       -96728 -96676 -96730   -96713 -96739    
PBE1PBE -94942   -96120 -96624 -96643 -96643 -96665 -96676 -96683 -96664   -96708 -96659 -96712   -96692 -96719    
HSEh1PBE -94946 -96158 -96130 -96633 -96651 -96656 -96673 -96684 -96692 -96672   -96716 -96667 -96720   -96700 -96727    
TPSSh -95003 -96214 -96184 -96688 -96700 -96705 -96722 -96737 -96744 -96720   -96768 -96719 -96770 -96783 -96751 -96777 -96785  
wB97X-D -94996 -96209 -96181 -96677 -96697 -96703 -96718 -96729 -96737 -96717   -96761 -96715 -96763 -96776 -96745 -96770 -96778  
B97D3 -94982 -96174 -96144 -96652 -96664 -96669 -96688 -96703 -96710 -96684 -96737 -96734 -96683 -96735 -96748 -96718 -96743 -96750 -96743
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 -94669 -96007 -95975 -96494 -96559 -96550 -96574 -96609 -96611 -96643   -96651 -96577 -96720 -96764 -96651 -96740 -96772  
MP2=FULL -94667 -96008 -95976 -96494 -96554 -96544 -96568 -96610 -96612 -96644   -96651 -96576 -96713 -96770 -96650 -96731 -96777  
ROMP2 -94638   -95958 -96476 -96545 -96536 -96560 -96596 -96598 -96629   -96637 -96565 -96706   -96638      
MP3         -96528   -96538         -96612 -96543 -96685          
MP3=FULL   -95978 -95946 -96457 -96523 -96512 -96532 -96574 -96572 -96616   -96611 -96542 -96678   -96612 -96694    
MP4   -95984     -96530       -96582     -96624 -96548 -96701   -96628 -96724    
MP4=FULL   -95984     -96524       -96581       -96546 -96693   -96627 -96712    
B2PLYP -94889 -96147 -96116 -96632 -96659 -96660 -96682 -96699 -96705 -96700   -96735 -96677 -96758   -96727 -96770    
B2PLYP=FULL -94889 -96147 -96116 -96632 -96658 -96659 -96680 -96699 -96705 -96700   -96735 -96677 -96756   -96727 -96768    
B2PLYP=FULLultrafine -94889 -96147 -96116 -96632 -96658 -96659 -96680 -96699 -96705 -96700   -96735 -96677 -96756   -96727      
Configuration interaction CID   -95972 -95940 -96451 -96514     -96561                      
CISD   -95965 -95937 -96442 -96507     -96556                      
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   -95960 -95937 -96441 -96514 -96505 -96526 -96562 -96562 -96604   -96601 -96533 -96676   -96604 -96695    
QCISD(T)         -96507     -96559       -96600 -96527 -96679   -96604 -96700    
QCISD(T)=FULL         -96502   -96516           -96526 -96671 -96729 -96604 -96689 -96736  
Coupled Cluster CCD   -95976 -95946 -96459 -96530 -96520 -96541 -96576 -96575 -96616   -96615 -96545 -96688   -96614 -96706    
CCSD         -96514         -96604   -96601 -96532 -96676 -96718 -96603 -96694    
CCSD=FULL         -96509         -96605   -96601 -96531 -96668 -96724 -96602 -96684    
CCSD(T)         -96508 -96499 -96522 -96560 -96560 -96604   -96600 -96528 -96679 -96725 -96605 -96701 -96733  
CCSD(T)=FULL         -96503             -96600 -96527 -96672 -96730 -96604 -96690 -96737  
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

Proton Affinities in kJ/mol
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 -26033 -26049 -26036 -26046 -96408 -96406     -96439
density functional B3LYP -26385 -26403 -26385 -26399 -96759 -96754     -96795
PBEPBE                 -96739
wB97X-D -26354 -26378 -26357 -26375 -96733 -96730      
Moller Plesset perturbation MP2 -26162 -26256 -26184 -26261 -96549 -96549     -96726
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.