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IV.D.1. (XII.C.1.)

Geometry Comparison

NS- (nitrogen sulfide anion)


distance is atom 1 (S) to atom 2 (N)
No experimental bond length available. Calculated bond lengths are shown.
Calculated bond length in Å
Methods with predefined basis sets
semi-empirical AM1 1.503
PM3 1.594
PM6 1.505
composite G2 1.589
G3 1.589
G3B3 1.617
CBS-Q 1.589

Calculated bond length in Å
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) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ
hartree fock HF 1.640 1.725 1.625 1.711 1.589 1.589 1.572 1.586 1.586 1.569 1.643 1.600 1.567 1.554 1.578 1.553 1.545
ROHF 1.675 1.790 1.698 1.778 1.655 1.655 1.646 1.656 1.656 1.638   1.665 1.637   1.658 1.633  
density functional LSDA 1.683 1.637 1.637 1.727 1.606 1.606 1.580 1.597 1.597 1.583   1.619 1.582 1.568 1.587 1.560  
SVWN   1.750     1.624   1.603                    
BLYP 1.713 1.778 1.680 1.768 1.644 1.644 1.613 1.638 1.638 1.619   1.657 1.618        
B1B95 1.670 1.635 1.635 1.720 1.600 1.600 1.577 1.595 1.595 1.580   1.613 1.579 1.566 1.584 1.560 1.551
B3LYP 1.686 1.748 1.651 1.738 1.617 1.617 1.592 1.611 1.611 1.595 1.632 1.630 1.593 1.579 1.598 1.572 1.562
B3LYPultrafine         1.617                        
B3PW91 1.679 1.739 1.642 1.728 1.609 1.609 1.585 1.602 1.602 1.588   1.621 1.586        
mPW1PW91 1.672 1.733 1.637 1.722 1.604 1.604 1.581 1.598 1.598 1.583   1.615 1.582        
M06-2X         1.626                        
PBEPBE 1.700 1.762 1.663 1.751 1.629 1.629 1.600 1.622 1.622 1.607   1.641 1.605 1.591     1.571
HSEh1PBE         1.628                        
Moller Plesset perturbation MP2FC 1.660 1.734 1.634 1.726 1.594 1.594 1.573 1.586 1.586 1.577 1.604 1.612 1.577 1.561 1.589 1.560 1.549
MP2FU 1.660 1.734 1.634 1.726 1.592 1.592 1.571 1.584 1.584 1.572   1.610 1.573 1.559 1.607 1.567 1.546
ROMP2   1.654 1.654 1.750 1.598 1.598 1.571 1.594 1.594 1.569   1.611 1.562   1.579    
MP3         1.595                        
MP4   1.765     1.623       1.615       1.605        
B2PLYP         1.633   1.616                    
Configuration interaction CID   1.737 1.632 1.725 1.593     1.585                  
CISD   1.755 1.642 1.745 1.601     1.592                  
Quadratic configuration interaction QCISD   1.808 1.665 1.816 1.624 1.624 1.604 1.616 1.616 1.601   1.641 1.600        
QCISD(T)         1.629             1.647 1.608   1.628 1.593  
Coupled Cluster CCD   1.742 1.637 1.731 1.598 1.598 1.578 1.590 1.590 1.579   1.614 1.578   1.593 1.562  
CCSD         1.613                        
CCSD(T)                       1.644 1.605 1.600 1.625 1.590  
CCSD(T)=FULL         1.624               1.613 1.597      

Calculated bond length in Å
Methods with effective core potentials (select basis sets)
CEP-31G CEP-31G* CEP-121G CEP-121G* LANL2DZ SDD
hartree fock HF 1.712 1.596 1.709 1.593 1.708 1.693
density functional B3LYP 1.748 1.627 1.741 1.624 1.743 1.725
Moller Plesset perturbation MP2FC 1.734 1.607 1.726 1.603 1.729 1.714
Values that are outliers may reflect different atom numbering for different levels of theory.
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